chore: regens API reference docs (#889)

diff --git a/docs/dyn/gmail_v1.users.messages.html b/docs/dyn/gmail_v1.users.messages.html
index 7e8e136..abb2d21 100644
--- a/docs/dyn/gmail_v1.users.messages.html
+++ b/docs/dyn/gmail_v1.users.messages.html
@@ -80,49 +80,51 @@
 <p class="firstline">Returns the attachments Resource.</p>
 
 <p class="toc_element">
-  <code><a href="#batchDelete">batchDelete(userId, body)</a></code></p>
-<p class="firstline">Deletes many messages by message ID. Provides no guarantees that messages were not already deleted or even existed at all.</p>
+  <code><a href="#batchDelete">batchDelete(userId, body=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Deletes many messages by message ID.  Provides no guarantees that messages</p>
 <p class="toc_element">
-  <code><a href="#batchModify">batchModify(userId, body)</a></code></p>
+  <code><a href="#batchModify">batchModify(userId, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Modifies the labels on the specified messages.</p>
 <p class="toc_element">
-  <code><a href="#delete">delete(userId, id)</a></code></p>
-<p class="firstline">Immediately and permanently deletes the specified message. This operation cannot be undone. Prefer messages.trash instead.</p>
+  <code><a href="#delete">delete(userId, id, x__xgafv=None)</a></code></p>
+<p class="firstline">Immediately and permanently deletes the specified message. This operation</p>
 <p class="toc_element">
-  <code><a href="#get">get(userId, id, format=None, metadataHeaders=None)</a></code></p>
+  <code><a href="#get">get(userId, id, format=None, x__xgafv=None, metadataHeaders=None)</a></code></p>
 <p class="firstline">Gets the specified message.</p>
 <p class="toc_element">
-  <code><a href="#import_">import_(userId, body=None, media_body=None, internalDateSource=None, neverMarkSpam=None, media_mime_type=None, deleted=None, processForCalendar=None)</a></code></p>
-<p class="firstline">Imports a message into only this user's mailbox, with standard email delivery scanning and classification similar to receiving via SMTP. Does not send a message.</p>
+  <code><a href="#import_">import_(userId, body=None, internalDateSource=None, neverMarkSpam=None, x__xgafv=None, media_body=None, deleted=None, media_mime_type=None, processForCalendar=None)</a></code></p>
+<p class="firstline">Imports a message into only this user's mailbox, with standard</p>
 <p class="toc_element">
-  <code><a href="#insert">insert(userId, body=None, media_body=None, internalDateSource=None, media_mime_type=None, deleted=None)</a></code></p>
-<p class="firstline">Directly inserts a message into only this user's mailbox similar to IMAP APPEND, bypassing most scanning and classification. Does not send a message.</p>
+  <code><a href="#insert">insert(userId, body=None, internalDateSource=None, media_body=None, deleted=None, x__xgafv=None, media_mime_type=None)</a></code></p>
+<p class="firstline">Directly inserts a message into only this user's mailbox similar to</p>
 <p class="toc_element">
-  <code><a href="#list">list(userId, labelIds=None, q=None, pageToken=None, maxResults=None, includeSpamTrash=None)</a></code></p>
+  <code><a href="#list">list(userId, labelIds=None, pageToken=None, includeSpamTrash=None, maxResults=None, q=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Lists the messages in the user's mailbox.</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#modify">modify(userId, id, body)</a></code></p>
+  <code><a href="#modify">modify(userId, id, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Modifies the labels on the specified message.</p>
 <p class="toc_element">
-  <code><a href="#send">send(userId, body=None, media_body=None, media_mime_type=None)</a></code></p>
-<p class="firstline">Sends the specified message to the recipients in the To, Cc, and Bcc headers.</p>
+  <code><a href="#send">send(userId, body=None, media_body=None, media_mime_type=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Sends the specified message to the recipients in the</p>
 <p class="toc_element">
-  <code><a href="#trash">trash(userId, id)</a></code></p>
+  <code><a href="#trash">trash(userId, id, x__xgafv=None)</a></code></p>
 <p class="firstline">Moves the specified message to the trash.</p>
 <p class="toc_element">
-  <code><a href="#untrash">untrash(userId, id)</a></code></p>
+  <code><a href="#untrash">untrash(userId, id, x__xgafv=None)</a></code></p>
 <p class="firstline">Removes the specified message from the trash.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="batchDelete">batchDelete(userId, body)</code>
-  <pre>Deletes many messages by message ID. Provides no guarantees that messages were not already deleted or even existed at all.
+    <code class="details" id="batchDelete">batchDelete(userId, body=None, x__xgafv=None)</code>
+  <pre>Deletes many messages by message ID.  Provides no guarantees that messages
+were not already deleted or even existed at all.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
-  body: object, The request body. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {
@@ -131,23 +133,29 @@
     ],
   }
 
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 </pre>
 </div>
 
 <div class="method">
-    <code class="details" id="batchModify">batchModify(userId, body)</code>
+    <code class="details" id="batchModify">batchModify(userId, body=None, x__xgafv=None)</code>
   <pre>Modifies the labels on the specified messages.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
-  body: object, The request body. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {
     "removeLabelIds": [ # A list of label IDs to remove from messages.
       "A String",
     ],
-    "ids": [ # The IDs of the messages to modify. There is a limit of 1000 ids per request.
+    "ids": [ # The IDs of the messages to modify. There is a limit of 1000 ids per
+        # request.
       "A String",
     ],
     "addLabelIds": [ # A list of label IDs to add to messages.
@@ -155,67 +163,112 @@
     ],
   }
 
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 </pre>
 </div>
 
 <div class="method">
-    <code class="details" id="delete">delete(userId, id)</code>
-  <pre>Immediately and permanently deletes the specified message. This operation cannot be undone. Prefer messages.trash instead.
+    <code class="details" id="delete">delete(userId, id, x__xgafv=None)</code>
+  <pre>Immediately and permanently deletes the specified message. This operation
+cannot be undone.  Prefer &lt;code&gt;messages.trash&lt;/code&gt; instead.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   id: string, The ID of the message to delete. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 </pre>
 </div>
 
 <div class="method">
-    <code class="details" id="get">get(userId, id, format=None, metadataHeaders=None)</code>
+    <code class="details" id="get">get(userId, id, format=None, x__xgafv=None, metadataHeaders=None)</code>
   <pre>Gets the specified message.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   id: string, The ID of the message to retrieve. (required)
   format: string, The format to return the message in.
+  x__xgafv: string, V1 error format.
     Allowed values
-      full - 
-      metadata - 
-      minimal - 
-      raw - 
+      1 - v1 error format
+      2 - v2 error format
   metadataHeaders: string, When given and format is METADATA, only include headers specified. (repeated)
 
 Returns:
   An object of the form:
 
     { # An email message.
-    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+        # ordering in the inbox.  For normal SMTP-received email, this represents the
+        # time the message was originally accepted by Google, which is more reliable
+        # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+        # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
     "historyId": "A String", # The ID of the last history record that modified this message.
     "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-        "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+          # container MIME message parts.
+        "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+            # May be empty for MIME container
+            # types that have no message body or when the body data is sent as a
+            # separate attachment. An attachment ID is present if the body data is
+            # contained in a separate attachment.
+        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+            # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+            # When not present, the entire content of the message part body is
+            # contained in the data field.
         "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
       },
       "mimeType": "A String", # The MIME type of the message part.
       "partId": "A String", # The immutable ID of the message part.
-      "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-      "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+      "filename": "A String", # The filename of the attachment. Only present if this message part
+          # represents an attachment.
+      "headers": [ # List of headers on this message part. For the top-level message part,
+          # representing the entire message payload, it will contain the standard
+          # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+          # &lt;code&gt;Subject&lt;/code&gt;.
         {
-          "name": "A String", # The name of the header before the : separator. For example, To.
-          "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+          "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+              # example, &lt;code&gt;To&lt;/code&gt;.
+          "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+              # &lt;code&gt;someuser@example.com&lt;/code&gt;.
         },
       ],
-      "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+      "parts": [ # The child MIME message parts of this part. This only applies to container
+          # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+          # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+          # field is empty. For more information, see
+          # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
         # Object with schema name: MessagePart
       ],
     },
     "snippet": "A String", # A short part of the message text.
-    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+        # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+        # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+        # parameter is supplied.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "sizeEstimate": 42, # Estimated size in bytes of the message.
-    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-        # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-        # - The Subject headers must match.
+    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+        # a thread, the following criteria must be met:
+        # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+        # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+        # request.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+        # be set in compliance with the
+        # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "labelIds": [ # List of IDs of labels applied to this message.
+        # @mutable gmail.users.messages.insert gmail.users.messages.modify
       "A String",
     ],
     "id": "A String", # The immutable ID of the message.
@@ -223,92 +276,171 @@
 </div>
 
 <div class="method">
-    <code class="details" id="import_">import_(userId, body=None, media_body=None, internalDateSource=None, neverMarkSpam=None, media_mime_type=None, deleted=None, processForCalendar=None)</code>
-  <pre>Imports a message into only this user's mailbox, with standard email delivery scanning and classification similar to receiving via SMTP. Does not send a message.
+    <code class="details" id="import_">import_(userId, body=None, internalDateSource=None, neverMarkSpam=None, x__xgafv=None, media_body=None, deleted=None, media_mime_type=None, processForCalendar=None)</code>
+  <pre>Imports a message into only this user's mailbox, with standard
+email delivery scanning and classification similar to receiving via SMTP.
+Does not send a message.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   body: object, The request body.
     The object takes the form of:
 
 { # An email message.
-  "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+  "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+      # ordering in the inbox.  For normal SMTP-received email, this represents the
+      # time the message was originally accepted by Google, which is more reliable
+      # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+      # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
   "historyId": "A String", # The ID of the last history record that modified this message.
   "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-    "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-      "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-      "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+    "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+        # container MIME message parts.
+      "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+          # May be empty for MIME container
+          # types that have no message body or when the body data is sent as a
+          # separate attachment. An attachment ID is present if the body data is
+          # contained in a separate attachment.
+      "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+          # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+          # When not present, the entire content of the message part body is
+          # contained in the data field.
       "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
     },
     "mimeType": "A String", # The MIME type of the message part.
     "partId": "A String", # The immutable ID of the message part.
-    "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-    "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+    "filename": "A String", # The filename of the attachment. Only present if this message part
+        # represents an attachment.
+    "headers": [ # List of headers on this message part. For the top-level message part,
+        # representing the entire message payload, it will contain the standard
+        # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+        # &lt;code&gt;Subject&lt;/code&gt;.
       {
-        "name": "A String", # The name of the header before the : separator. For example, To.
-        "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+        "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+            # example, &lt;code&gt;To&lt;/code&gt;.
+        "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+            # &lt;code&gt;someuser@example.com&lt;/code&gt;.
       },
     ],
-    "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+    "parts": [ # The child MIME message parts of this part. This only applies to container
+        # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+        # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+        # field is empty. For more information, see
+        # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
       # Object with schema name: MessagePart
     ],
   },
   "snippet": "A String", # A short part of the message text.
-  "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+  "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+      # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+      # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+      # parameter is supplied.
+      # @mutable gmail.users.messages.insert gmail.users.messages.send
+      # @mutable gmail.users.drafts.create gmail.users.drafts.update
   "sizeEstimate": 42, # Estimated size in bytes of the message.
-  "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-      # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-      # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-      # - The Subject headers must match.
+  "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+      # a thread, the following criteria must be met:
+      # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+      # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+      # request.&lt;/li&gt;
+      # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+      # be set in compliance with the
+      # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+      # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+      # @mutable gmail.users.messages.insert gmail.users.messages.send
+      # @mutable gmail.users.drafts.create gmail.users.drafts.update
   "labelIds": [ # List of IDs of labels applied to this message.
+      # @mutable gmail.users.messages.insert gmail.users.messages.modify
     "A String",
   ],
   "id": "A String", # The immutable ID of the message.
 }
 
-  media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
   internalDateSource: string, Source for Gmail's internal date of the message.
+  neverMarkSpam: boolean, Ignore the Gmail spam classifier decision and never mark
+this email as SPAM in the mailbox.
+  x__xgafv: string, V1 error format.
     Allowed values
-      dateHeader - 
-      receivedTime - 
-  neverMarkSpam: boolean, Ignore the Gmail spam classifier decision and never mark this email as SPAM in the mailbox.
+      1 - v1 error format
+      2 - v2 error format
+  media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
+  deleted: boolean, Mark the email as permanently deleted (not TRASH) and
+only visible in
+&lt;a href="http://support.google.com/vault/"&gt;Google Vault&lt;/a&gt; to
+a Vault administrator. Only used for G Suite accounts.
   media_mime_type: string, The MIME type of the media request body, or an instance of a MediaUpload object.
-  deleted: boolean, Mark the email as permanently deleted (not TRASH) and only visible in Google Vault to a Vault administrator. Only used for G Suite accounts.
-  processForCalendar: boolean, Process calendar invites in the email and add any extracted meetings to the Google Calendar for this user.
+  processForCalendar: boolean, Process calendar invites in the email and add any extracted
+meetings to the Google Calendar for this user.
 
 Returns:
   An object of the form:
 
     { # An email message.
-    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+        # ordering in the inbox.  For normal SMTP-received email, this represents the
+        # time the message was originally accepted by Google, which is more reliable
+        # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+        # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
     "historyId": "A String", # The ID of the last history record that modified this message.
     "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-        "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+          # container MIME message parts.
+        "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+            # May be empty for MIME container
+            # types that have no message body or when the body data is sent as a
+            # separate attachment. An attachment ID is present if the body data is
+            # contained in a separate attachment.
+        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+            # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+            # When not present, the entire content of the message part body is
+            # contained in the data field.
         "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
       },
       "mimeType": "A String", # The MIME type of the message part.
       "partId": "A String", # The immutable ID of the message part.
-      "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-      "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+      "filename": "A String", # The filename of the attachment. Only present if this message part
+          # represents an attachment.
+      "headers": [ # List of headers on this message part. For the top-level message part,
+          # representing the entire message payload, it will contain the standard
+          # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+          # &lt;code&gt;Subject&lt;/code&gt;.
         {
-          "name": "A String", # The name of the header before the : separator. For example, To.
-          "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+          "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+              # example, &lt;code&gt;To&lt;/code&gt;.
+          "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+              # &lt;code&gt;someuser@example.com&lt;/code&gt;.
         },
       ],
-      "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+      "parts": [ # The child MIME message parts of this part. This only applies to container
+          # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+          # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+          # field is empty. For more information, see
+          # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
         # Object with schema name: MessagePart
       ],
     },
     "snippet": "A String", # A short part of the message text.
-    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+        # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+        # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+        # parameter is supplied.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "sizeEstimate": 42, # Estimated size in bytes of the message.
-    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-        # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-        # - The Subject headers must match.
+    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+        # a thread, the following criteria must be met:
+        # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+        # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+        # request.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+        # be set in compliance with the
+        # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "labelIds": [ # List of IDs of labels applied to this message.
+        # @mutable gmail.users.messages.insert gmail.users.messages.modify
       "A String",
     ],
     "id": "A String", # The immutable ID of the message.
@@ -316,90 +448,167 @@
 </div>
 
 <div class="method">
-    <code class="details" id="insert">insert(userId, body=None, media_body=None, internalDateSource=None, media_mime_type=None, deleted=None)</code>
-  <pre>Directly inserts a message into only this user's mailbox similar to IMAP APPEND, bypassing most scanning and classification. Does not send a message.
+    <code class="details" id="insert">insert(userId, body=None, internalDateSource=None, media_body=None, deleted=None, x__xgafv=None, media_mime_type=None)</code>
+  <pre>Directly inserts a message into only this user's mailbox similar to
+&lt;code&gt;IMAP APPEND&lt;/code&gt;, bypassing most scanning and classification.
+Does not send a message.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   body: object, The request body.
     The object takes the form of:
 
 { # An email message.
-  "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+  "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+      # ordering in the inbox.  For normal SMTP-received email, this represents the
+      # time the message was originally accepted by Google, which is more reliable
+      # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+      # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
   "historyId": "A String", # The ID of the last history record that modified this message.
   "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-    "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-      "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-      "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+    "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+        # container MIME message parts.
+      "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+          # May be empty for MIME container
+          # types that have no message body or when the body data is sent as a
+          # separate attachment. An attachment ID is present if the body data is
+          # contained in a separate attachment.
+      "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+          # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+          # When not present, the entire content of the message part body is
+          # contained in the data field.
       "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
     },
     "mimeType": "A String", # The MIME type of the message part.
     "partId": "A String", # The immutable ID of the message part.
-    "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-    "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+    "filename": "A String", # The filename of the attachment. Only present if this message part
+        # represents an attachment.
+    "headers": [ # List of headers on this message part. For the top-level message part,
+        # representing the entire message payload, it will contain the standard
+        # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+        # &lt;code&gt;Subject&lt;/code&gt;.
       {
-        "name": "A String", # The name of the header before the : separator. For example, To.
-        "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+        "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+            # example, &lt;code&gt;To&lt;/code&gt;.
+        "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+            # &lt;code&gt;someuser@example.com&lt;/code&gt;.
       },
     ],
-    "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+    "parts": [ # The child MIME message parts of this part. This only applies to container
+        # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+        # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+        # field is empty. For more information, see
+        # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
       # Object with schema name: MessagePart
     ],
   },
   "snippet": "A String", # A short part of the message text.
-  "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+  "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+      # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+      # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+      # parameter is supplied.
+      # @mutable gmail.users.messages.insert gmail.users.messages.send
+      # @mutable gmail.users.drafts.create gmail.users.drafts.update
   "sizeEstimate": 42, # Estimated size in bytes of the message.
-  "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-      # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-      # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-      # - The Subject headers must match.
+  "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+      # a thread, the following criteria must be met:
+      # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+      # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+      # request.&lt;/li&gt;
+      # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+      # be set in compliance with the
+      # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+      # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+      # @mutable gmail.users.messages.insert gmail.users.messages.send
+      # @mutable gmail.users.drafts.create gmail.users.drafts.update
   "labelIds": [ # List of IDs of labels applied to this message.
+      # @mutable gmail.users.messages.insert gmail.users.messages.modify
     "A String",
   ],
   "id": "A String", # The immutable ID of the message.
 }
 
-  media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
   internalDateSource: string, Source for Gmail's internal date of the message.
+  media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
+  deleted: boolean, Mark the email as permanently deleted (not TRASH) and
+only visible in
+&lt;a href="http://support.google.com/vault/"&gt;Google Vault&lt;/a&gt; to
+a Vault administrator. Only used for G Suite accounts.
+  x__xgafv: string, V1 error format.
     Allowed values
-      dateHeader - 
-      receivedTime - 
+      1 - v1 error format
+      2 - v2 error format
   media_mime_type: string, The MIME type of the media request body, or an instance of a MediaUpload object.
-  deleted: boolean, Mark the email as permanently deleted (not TRASH) and only visible in Google Vault to a Vault administrator. Only used for G Suite accounts.
 
 Returns:
   An object of the form:
 
     { # An email message.
-    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+        # ordering in the inbox.  For normal SMTP-received email, this represents the
+        # time the message was originally accepted by Google, which is more reliable
+        # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+        # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
     "historyId": "A String", # The ID of the last history record that modified this message.
     "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-        "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+          # container MIME message parts.
+        "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+            # May be empty for MIME container
+            # types that have no message body or when the body data is sent as a
+            # separate attachment. An attachment ID is present if the body data is
+            # contained in a separate attachment.
+        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+            # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+            # When not present, the entire content of the message part body is
+            # contained in the data field.
         "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
       },
       "mimeType": "A String", # The MIME type of the message part.
       "partId": "A String", # The immutable ID of the message part.
-      "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-      "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+      "filename": "A String", # The filename of the attachment. Only present if this message part
+          # represents an attachment.
+      "headers": [ # List of headers on this message part. For the top-level message part,
+          # representing the entire message payload, it will contain the standard
+          # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+          # &lt;code&gt;Subject&lt;/code&gt;.
         {
-          "name": "A String", # The name of the header before the : separator. For example, To.
-          "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+          "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+              # example, &lt;code&gt;To&lt;/code&gt;.
+          "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+              # &lt;code&gt;someuser@example.com&lt;/code&gt;.
         },
       ],
-      "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+      "parts": [ # The child MIME message parts of this part. This only applies to container
+          # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+          # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+          # field is empty. For more information, see
+          # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
         # Object with schema name: MessagePart
       ],
     },
     "snippet": "A String", # A short part of the message text.
-    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+        # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+        # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+        # parameter is supplied.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "sizeEstimate": 42, # Estimated size in bytes of the message.
-    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-        # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-        # - The Subject headers must match.
+    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+        # a thread, the following criteria must be met:
+        # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+        # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+        # request.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+        # be set in compliance with the
+        # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "labelIds": [ # List of IDs of labels applied to this message.
+        # @mutable gmail.users.messages.insert gmail.users.messages.modify
       "A String",
     ],
     "id": "A String", # The immutable ID of the message.
@@ -407,16 +616,26 @@
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(userId, labelIds=None, q=None, pageToken=None, maxResults=None, includeSpamTrash=None)</code>
+    <code class="details" id="list">list(userId, labelIds=None, pageToken=None, includeSpamTrash=None, maxResults=None, q=None, x__xgafv=None)</code>
   <pre>Lists the messages in the user's mailbox.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   labelIds: string, Only return messages with labels that match all of the specified label IDs. (repeated)
-  q: string, Only return messages matching the specified query. Supports the same query format as the Gmail search box. For example, "from:someuser@example.com rfc822msgid:<somemsgid@example.com> is:unread". Parameter cannot be used when accessing the api using the gmail.metadata scope.
   pageToken: string, Page token to retrieve a specific page of results in the list.
+  includeSpamTrash: boolean, Include messages from &lt;code&gt;SPAM&lt;/code&gt; and &lt;code&gt;TRASH&lt;/code&gt;
+in the results.
   maxResults: integer, Maximum number of messages to return.
-  includeSpamTrash: boolean, Include messages from SPAM and TRASH in the results.
+  q: string, Only return messages matching the specified query. Supports the same
+query format as the Gmail search box. For example,
+&lt;code&gt;"from:someuser@example.com rfc822msgid:&amp;lt;somemsgid@example.com&amp;gt;
+is:unread"&lt;/code&gt;. Parameter cannot be used when accessing the api
+using the gmail.metadata scope.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
@@ -424,37 +643,76 @@
     {
     "nextPageToken": "A String", # Token to retrieve the next page of results in the list.
     "resultSizeEstimate": 42, # Estimated total number of results.
-    "messages": [ # List of messages. Note that each message resource contains only an id and a threadId. Additional message details can be fetched using the messages.get method.
+    "messages": [ # List of messages. Note that each message resource contains only an
+        # &lt;code&gt;id&lt;/code&gt; and a &lt;code&gt;threadId&lt;/code&gt;. Additional message details can
+        # be fetched using the
+        # &lt;a href="/gmail/api/v1/reference/users/messages/get"&gt;messages.get&lt;/a&gt;
+        # method.
       { # An email message.
-        "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+        "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+            # ordering in the inbox.  For normal SMTP-received email, this represents the
+            # time the message was originally accepted by Google, which is more reliable
+            # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+            # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
         "historyId": "A String", # The ID of the last history record that modified this message.
         "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-          "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-            "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-            "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+          "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+              # container MIME message parts.
+            "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+                # May be empty for MIME container
+                # types that have no message body or when the body data is sent as a
+                # separate attachment. An attachment ID is present if the body data is
+                # contained in a separate attachment.
+            "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+                # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+                # When not present, the entire content of the message part body is
+                # contained in the data field.
             "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
           },
           "mimeType": "A String", # The MIME type of the message part.
           "partId": "A String", # The immutable ID of the message part.
-          "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-          "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+          "filename": "A String", # The filename of the attachment. Only present if this message part
+              # represents an attachment.
+          "headers": [ # List of headers on this message part. For the top-level message part,
+              # representing the entire message payload, it will contain the standard
+              # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+              # &lt;code&gt;Subject&lt;/code&gt;.
             {
-              "name": "A String", # The name of the header before the : separator. For example, To.
-              "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+              "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+                  # example, &lt;code&gt;To&lt;/code&gt;.
+              "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+                  # &lt;code&gt;someuser@example.com&lt;/code&gt;.
             },
           ],
-          "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+          "parts": [ # The child MIME message parts of this part. This only applies to container
+              # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+              # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+              # field is empty. For more information, see
+              # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
             # Object with schema name: MessagePart
           ],
         },
         "snippet": "A String", # A short part of the message text.
-        "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+        "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+            # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+            # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+            # parameter is supplied.
+            # @mutable gmail.users.messages.insert gmail.users.messages.send
+            # @mutable gmail.users.drafts.create gmail.users.drafts.update
         "sizeEstimate": 42, # Estimated size in bytes of the message.
-        "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-            # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-            # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-            # - The Subject headers must match.
+        "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+            # a thread, the following criteria must be met:
+            # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+            # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+            # request.&lt;/li&gt;
+            # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+            # be set in compliance with the
+            # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+            # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+            # @mutable gmail.users.messages.insert gmail.users.messages.send
+            # @mutable gmail.users.drafts.create gmail.users.drafts.update
         "labelIds": [ # List of IDs of labels applied to this message.
+            # @mutable gmail.users.messages.insert gmail.users.messages.modify
           "A String",
         ],
         "id": "A String", # The immutable ID of the message.
@@ -478,13 +736,14 @@
 </div>
 
 <div class="method">
-    <code class="details" id="modify">modify(userId, id, body)</code>
+    <code class="details" id="modify">modify(userId, id, body=None, x__xgafv=None)</code>
   <pre>Modifies the labels on the specified message.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   id: string, The ID of the message to modify. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {
@@ -496,40 +755,79 @@
     ],
   }
 
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
     { # An email message.
-    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+        # ordering in the inbox.  For normal SMTP-received email, this represents the
+        # time the message was originally accepted by Google, which is more reliable
+        # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+        # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
     "historyId": "A String", # The ID of the last history record that modified this message.
     "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-        "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+          # container MIME message parts.
+        "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+            # May be empty for MIME container
+            # types that have no message body or when the body data is sent as a
+            # separate attachment. An attachment ID is present if the body data is
+            # contained in a separate attachment.
+        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+            # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+            # When not present, the entire content of the message part body is
+            # contained in the data field.
         "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
       },
       "mimeType": "A String", # The MIME type of the message part.
       "partId": "A String", # The immutable ID of the message part.
-      "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-      "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+      "filename": "A String", # The filename of the attachment. Only present if this message part
+          # represents an attachment.
+      "headers": [ # List of headers on this message part. For the top-level message part,
+          # representing the entire message payload, it will contain the standard
+          # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+          # &lt;code&gt;Subject&lt;/code&gt;.
         {
-          "name": "A String", # The name of the header before the : separator. For example, To.
-          "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+          "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+              # example, &lt;code&gt;To&lt;/code&gt;.
+          "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+              # &lt;code&gt;someuser@example.com&lt;/code&gt;.
         },
       ],
-      "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+      "parts": [ # The child MIME message parts of this part. This only applies to container
+          # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+          # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+          # field is empty. For more information, see
+          # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
         # Object with schema name: MessagePart
       ],
     },
     "snippet": "A String", # A short part of the message text.
-    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+        # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+        # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+        # parameter is supplied.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "sizeEstimate": 42, # Estimated size in bytes of the message.
-    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-        # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-        # - The Subject headers must match.
+    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+        # a thread, the following criteria must be met:
+        # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+        # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+        # request.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+        # be set in compliance with the
+        # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "labelIds": [ # List of IDs of labels applied to this message.
+        # @mutable gmail.users.messages.insert gmail.users.messages.modify
       "A String",
     ],
     "id": "A String", # The immutable ID of the message.
@@ -537,44 +835,81 @@
 </div>
 
 <div class="method">
-    <code class="details" id="send">send(userId, body=None, media_body=None, media_mime_type=None)</code>
-  <pre>Sends the specified message to the recipients in the To, Cc, and Bcc headers.
+    <code class="details" id="send">send(userId, body=None, media_body=None, media_mime_type=None, x__xgafv=None)</code>
+  <pre>Sends the specified message to the recipients in the
+&lt;code&gt;To&lt;/code&gt;, &lt;code&gt;Cc&lt;/code&gt;, and &lt;code&gt;Bcc&lt;/code&gt; headers.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   body: object, The request body.
     The object takes the form of:
 
 { # An email message.
-  "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+  "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+      # ordering in the inbox.  For normal SMTP-received email, this represents the
+      # time the message was originally accepted by Google, which is more reliable
+      # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+      # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
   "historyId": "A String", # The ID of the last history record that modified this message.
   "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-    "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-      "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-      "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+    "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+        # container MIME message parts.
+      "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+          # May be empty for MIME container
+          # types that have no message body or when the body data is sent as a
+          # separate attachment. An attachment ID is present if the body data is
+          # contained in a separate attachment.
+      "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+          # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+          # When not present, the entire content of the message part body is
+          # contained in the data field.
       "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
     },
     "mimeType": "A String", # The MIME type of the message part.
     "partId": "A String", # The immutable ID of the message part.
-    "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-    "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+    "filename": "A String", # The filename of the attachment. Only present if this message part
+        # represents an attachment.
+    "headers": [ # List of headers on this message part. For the top-level message part,
+        # representing the entire message payload, it will contain the standard
+        # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+        # &lt;code&gt;Subject&lt;/code&gt;.
       {
-        "name": "A String", # The name of the header before the : separator. For example, To.
-        "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+        "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+            # example, &lt;code&gt;To&lt;/code&gt;.
+        "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+            # &lt;code&gt;someuser@example.com&lt;/code&gt;.
       },
     ],
-    "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+    "parts": [ # The child MIME message parts of this part. This only applies to container
+        # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+        # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+        # field is empty. For more information, see
+        # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
       # Object with schema name: MessagePart
     ],
   },
   "snippet": "A String", # A short part of the message text.
-  "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+  "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+      # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+      # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+      # parameter is supplied.
+      # @mutable gmail.users.messages.insert gmail.users.messages.send
+      # @mutable gmail.users.drafts.create gmail.users.drafts.update
   "sizeEstimate": 42, # Estimated size in bytes of the message.
-  "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-      # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-      # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-      # - The Subject headers must match.
+  "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+      # a thread, the following criteria must be met:
+      # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+      # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+      # request.&lt;/li&gt;
+      # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+      # be set in compliance with the
+      # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+      # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+      # @mutable gmail.users.messages.insert gmail.users.messages.send
+      # @mutable gmail.users.drafts.create gmail.users.drafts.update
   "labelIds": [ # List of IDs of labels applied to this message.
+      # @mutable gmail.users.messages.insert gmail.users.messages.modify
     "A String",
   ],
   "id": "A String", # The immutable ID of the message.
@@ -582,40 +917,79 @@
 
   media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
   media_mime_type: string, The MIME type of the media request body, or an instance of a MediaUpload object.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
     { # An email message.
-    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+        # ordering in the inbox.  For normal SMTP-received email, this represents the
+        # time the message was originally accepted by Google, which is more reliable
+        # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+        # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
     "historyId": "A String", # The ID of the last history record that modified this message.
     "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-        "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+          # container MIME message parts.
+        "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+            # May be empty for MIME container
+            # types that have no message body or when the body data is sent as a
+            # separate attachment. An attachment ID is present if the body data is
+            # contained in a separate attachment.
+        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+            # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+            # When not present, the entire content of the message part body is
+            # contained in the data field.
         "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
       },
       "mimeType": "A String", # The MIME type of the message part.
       "partId": "A String", # The immutable ID of the message part.
-      "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-      "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+      "filename": "A String", # The filename of the attachment. Only present if this message part
+          # represents an attachment.
+      "headers": [ # List of headers on this message part. For the top-level message part,
+          # representing the entire message payload, it will contain the standard
+          # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+          # &lt;code&gt;Subject&lt;/code&gt;.
         {
-          "name": "A String", # The name of the header before the : separator. For example, To.
-          "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+          "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+              # example, &lt;code&gt;To&lt;/code&gt;.
+          "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+              # &lt;code&gt;someuser@example.com&lt;/code&gt;.
         },
       ],
-      "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+      "parts": [ # The child MIME message parts of this part. This only applies to container
+          # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+          # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+          # field is empty. For more information, see
+          # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
         # Object with schema name: MessagePart
       ],
     },
     "snippet": "A String", # A short part of the message text.
-    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+        # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+        # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+        # parameter is supplied.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "sizeEstimate": 42, # Estimated size in bytes of the message.
-    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-        # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-        # - The Subject headers must match.
+    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+        # a thread, the following criteria must be met:
+        # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+        # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+        # request.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+        # be set in compliance with the
+        # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "labelIds": [ # List of IDs of labels applied to this message.
+        # @mutable gmail.users.messages.insert gmail.users.messages.modify
       "A String",
     ],
     "id": "A String", # The immutable ID of the message.
@@ -623,46 +997,86 @@
 </div>
 
 <div class="method">
-    <code class="details" id="trash">trash(userId, id)</code>
+    <code class="details" id="trash">trash(userId, id, x__xgafv=None)</code>
   <pre>Moves the specified message to the trash.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   id: string, The ID of the message to Trash. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
     { # An email message.
-    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+        # ordering in the inbox.  For normal SMTP-received email, this represents the
+        # time the message was originally accepted by Google, which is more reliable
+        # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+        # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
     "historyId": "A String", # The ID of the last history record that modified this message.
     "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-        "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+          # container MIME message parts.
+        "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+            # May be empty for MIME container
+            # types that have no message body or when the body data is sent as a
+            # separate attachment. An attachment ID is present if the body data is
+            # contained in a separate attachment.
+        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+            # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+            # When not present, the entire content of the message part body is
+            # contained in the data field.
         "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
       },
       "mimeType": "A String", # The MIME type of the message part.
       "partId": "A String", # The immutable ID of the message part.
-      "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-      "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+      "filename": "A String", # The filename of the attachment. Only present if this message part
+          # represents an attachment.
+      "headers": [ # List of headers on this message part. For the top-level message part,
+          # representing the entire message payload, it will contain the standard
+          # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+          # &lt;code&gt;Subject&lt;/code&gt;.
         {
-          "name": "A String", # The name of the header before the : separator. For example, To.
-          "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+          "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+              # example, &lt;code&gt;To&lt;/code&gt;.
+          "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+              # &lt;code&gt;someuser@example.com&lt;/code&gt;.
         },
       ],
-      "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+      "parts": [ # The child MIME message parts of this part. This only applies to container
+          # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+          # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+          # field is empty. For more information, see
+          # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
         # Object with schema name: MessagePart
       ],
     },
     "snippet": "A String", # A short part of the message text.
-    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+        # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+        # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+        # parameter is supplied.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "sizeEstimate": 42, # Estimated size in bytes of the message.
-    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-        # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-        # - The Subject headers must match.
+    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+        # a thread, the following criteria must be met:
+        # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+        # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+        # request.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+        # be set in compliance with the
+        # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "labelIds": [ # List of IDs of labels applied to this message.
+        # @mutable gmail.users.messages.insert gmail.users.messages.modify
       "A String",
     ],
     "id": "A String", # The immutable ID of the message.
@@ -670,46 +1084,86 @@
 </div>
 
 <div class="method">
-    <code class="details" id="untrash">untrash(userId, id)</code>
+    <code class="details" id="untrash">untrash(userId, id, x__xgafv=None)</code>
   <pre>Removes the specified message from the trash.
 
 Args:
-  userId: string, The user's email address. The special value me can be used to indicate the authenticated user. (required)
+  userId: string, The user's email address. The special value &lt;code&gt;me&lt;/code&gt;
+can be used to indicate the authenticated user. (required)
   id: string, The ID of the message to remove from Trash. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
     { # An email message.
-    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines ordering in the inbox. For normal SMTP-received email, this represents the time the message was originally accepted by Google, which is more reliable than the Date header. However, for API-migrated mail, it can be configured by client to be based on the Date header.
+    "internalDate": "A String", # The internal message creation timestamp (epoch ms), which determines
+        # ordering in the inbox.  For normal SMTP-received email, this represents the
+        # time the message was originally accepted by Google, which is more reliable
+        # than the &lt;code&gt;Date&lt;/code&gt; header. However, for API-migrated mail, it can
+        # be configured by client to be based on the &lt;code&gt;Date&lt;/code&gt; header.
     "historyId": "A String", # The ID of the last history record that modified this message.
     "payload": { # A single MIME message part. # The parsed email structure in the message parts.
-      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for container MIME message parts.
-        "data": "A String", # The body data of a MIME message part as a base64url encoded string. May be empty for MIME container types that have no message body or when the body data is sent as a separate attachment. An attachment ID is present if the body data is contained in a separate attachment.
-        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be retrieved in a separate messages.attachments.get request. When not present, the entire content of the message part body is contained in the data field.
+      "body": { # The body of a single MIME message part. # The message part body for this part, which may be empty for
+          # container MIME message parts.
+        "data": "A String", # The body data of a MIME message part as a base64url encoded string.
+            # May be empty for MIME container
+            # types that have no message body or when the body data is sent as a
+            # separate attachment. An attachment ID is present if the body data is
+            # contained in a separate attachment.
+        "attachmentId": "A String", # When present, contains the ID of an external attachment that can be
+            # retrieved in a separate &lt;code&gt;messages.attachments.get&lt;/code&gt; request.
+            # When not present, the entire content of the message part body is
+            # contained in the data field.
         "size": 42, # Number of bytes for the message part data (encoding notwithstanding).
       },
       "mimeType": "A String", # The MIME type of the message part.
       "partId": "A String", # The immutable ID of the message part.
-      "filename": "A String", # The filename of the attachment. Only present if this message part represents an attachment.
-      "headers": [ # List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as To, From, and Subject.
+      "filename": "A String", # The filename of the attachment. Only present if this message part
+          # represents an attachment.
+      "headers": [ # List of headers on this message part. For the top-level message part,
+          # representing the entire message payload, it will contain the standard
+          # RFC 2822 email headers such as &lt;code&gt;To&lt;/code&gt;, &lt;code&gt;From&lt;/code&gt;, and
+          # &lt;code&gt;Subject&lt;/code&gt;.
         {
-          "name": "A String", # The name of the header before the : separator. For example, To.
-          "value": "A String", # The value of the header after the : separator. For example, someuser@example.com.
+          "name": "A String", # The name of the header before the &lt;code&gt;:&lt;/code&gt; separator. For
+              # example, &lt;code&gt;To&lt;/code&gt;.
+          "value": "A String", # The value of the header after the &lt;code&gt;:&lt;/code&gt; separator. For example,
+              # &lt;code&gt;someuser@example.com&lt;/code&gt;.
         },
       ],
-      "parts": [ # The child MIME message parts of this part. This only applies to container MIME message parts, for example multipart/*. For non- container MIME message part types, such as text/plain, this field is empty. For more information, see RFC 1521.
+      "parts": [ # The child MIME message parts of this part. This only applies to container
+          # MIME message parts, for example &lt;code&gt;multipart/*&lt;/code&gt;. For non-
+          # container MIME message part types, such as &lt;code&gt;text/plain&lt;/code&gt;, this
+          # field is empty. For more information, see
+          # &lt;a href="http://www.ietf.org/rfc/rfc1521.txt"&gt;RFC 1521&lt;/a&gt;.
         # Object with schema name: MessagePart
       ],
     },
     "snippet": "A String", # A short part of the message text.
-    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url encoded string. Returned in messages.get and drafts.get responses when the format=RAW parameter is supplied.
+    "raw": "A String", # The entire email message in an RFC 2822 formatted and base64url
+        # encoded string. Returned in &lt;code&gt;messages.get&lt;/code&gt; and
+        # &lt;code&gt;drafts.get&lt;/code&gt; responses when the &lt;code&gt;format=RAW&lt;/code&gt;
+        # parameter is supplied.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "sizeEstimate": 42, # Estimated size in bytes of the message.
-    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to a thread, the following criteria must be met:
-        # - The requested threadId must be specified on the Message or Draft.Message you supply with your request.
-        # - The References and In-Reply-To headers must be set in compliance with the RFC 2822 standard.
-        # - The Subject headers must match.
+    "threadId": "A String", # The ID of the thread the message belongs to. To add a message or draft to
+        # a thread, the following criteria must be met:
+        # &lt;ol&gt;&lt;li&gt;The requested &lt;code&gt;threadId&lt;/code&gt; must be specified on the
+        # &lt;code&gt;Message&lt;/code&gt; or &lt;code&gt;Draft.Message&lt;/code&gt; you supply with your
+        # request.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;References&lt;/code&gt; and &lt;code&gt;In-Reply-To&lt;/code&gt; headers must
+        # be set in compliance with the
+        # &lt;a href="https://tools.ietf.org/html/rfc2822"&gt;RFC 2822&lt;/a&gt; standard.&lt;/li&gt;
+        # &lt;li&gt;The &lt;code&gt;Subject&lt;/code&gt; headers must match.
+        # @mutable gmail.users.messages.insert gmail.users.messages.send
+        # @mutable gmail.users.drafts.create gmail.users.drafts.update
     "labelIds": [ # List of IDs of labels applied to this message.
+        # @mutable gmail.users.messages.insert gmail.users.messages.modify
       "A String",
     ],
     "id": "A String", # The immutable ID of the message.