chore: regens API reference docs (#889)

diff --git a/docs/dyn/gmail_v1.users.drafts.html b/docs/dyn/gmail_v1.users.drafts.html
index a021d45..d036903 100644
--- a/docs/dyn/gmail_v1.users.drafts.html
+++ b/docs/dyn/gmail_v1.users.drafts.html
@@ -75,67 +75,103 @@
 <h1><a href="gmail_v1.html">Gmail API</a> . <a href="gmail_v1.users.html">users</a> . <a href="gmail_v1.users.drafts.html">drafts</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(userId, body=None, media_body=None, media_mime_type=None)</a></code></p>
-<p class="firstline">Creates a new draft with the DRAFT label.</p>
+  <code><a href="#create">create(userId, body=None, media_body=None, media_mime_type=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Creates a new draft with the <code>DRAFT</code> label.</p>
 <p class="toc_element">
-  <code><a href="#delete">delete(userId, id)</a></code></p>
-<p class="firstline">Immediately and permanently deletes the specified draft. Does not simply trash it.</p>
+  <code><a href="#delete">delete(userId, id, x__xgafv=None)</a></code></p>
+<p class="firstline">Immediately and permanently deletes the specified draft.</p>
 <p class="toc_element">
-  <code><a href="#get">get(userId, id, format=None)</a></code></p>
+  <code><a href="#get">get(userId, id, format=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Gets the specified draft.</p>
 <p class="toc_element">
-  <code><a href="#list">list(userId, q=None, pageToken=None, maxResults=None, includeSpamTrash=None)</a></code></p>
+  <code><a href="#list">list(userId, pageToken=None, includeSpamTrash=None, maxResults=None, q=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Lists the drafts 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="#send">send(userId, body=None, media_body=None, media_mime_type=None)</a></code></p>
-<p class="firstline">Sends the specified, existing draft 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, existing draft to the recipients in the</p>
 <p class="toc_element">
-  <code><a href="#update">update(userId, id, body=None, media_body=None, media_mime_type=None)</a></code></p>
+  <code><a href="#update">update(userId, id, body=None, media_body=None, media_mime_type=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Replaces a draft's content.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(userId, body=None, media_body=None, media_mime_type=None)</code>
-  <pre>Creates a new draft with the DRAFT label.
+    <code class="details" id="create">create(userId, body=None, media_body=None, media_mime_type=None, x__xgafv=None)</code>
+  <pre>Creates a new draft with the &lt;code&gt;DRAFT&lt;/code&gt; label.
 
 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:
 
 { # A draft email in the user's mailbox.
   "message": { # An email message. # The message content of the draft.
-    "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.
@@ -145,41 +181,80 @@
 
   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:
 
     { # A draft email in the user's mailbox.
     "message": { # An email message. # The message content of the draft.
-      "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.
@@ -189,63 +264,104 @@
 </div>
 
 <div class="method">
-    <code class="details" id="delete">delete(userId, id)</code>
-  <pre>Immediately and permanently deletes the specified draft. Does not simply trash it.
+    <code class="details" id="delete">delete(userId, id, x__xgafv=None)</code>
+  <pre>Immediately and permanently deletes the specified draft.
+Does not simply trash it.
 
 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 draft 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)</code>
+    <code class="details" id="get">get(userId, id, format=None, x__xgafv=None)</code>
   <pre>Gets the specified draft.
 
 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 draft to retrieve. (required)
   format: string, The format to return the draft in.
+  x__xgafv: string, V1 error format.
     Allowed values
-      full - 
-      metadata - 
-      minimal - 
-      raw - 
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
 
     { # A draft email in the user's mailbox.
     "message": { # An email message. # The message content of the draft.
-      "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.
@@ -255,15 +371,24 @@
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(userId, q=None, pageToken=None, maxResults=None, includeSpamTrash=None)</code>
+    <code class="details" id="list">list(userId, pageToken=None, includeSpamTrash=None, maxResults=None, q=None, x__xgafv=None)</code>
   <pre>Lists the drafts 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)
-  q: string, Only return draft messages matching the specified query. Supports the same query format as the Gmail search box. For example, "from:someuser@example.com rfc822msgid: is:unread".
+  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)
   pageToken: string, Page token to retrieve a specific page of results in the list.
+  includeSpamTrash: boolean, Include drafts from &lt;code&gt;SPAM&lt;/code&gt; and &lt;code&gt;TRASH&lt;/code&gt;
+in the results.
   maxResults: integer, Maximum number of drafts to return.
-  includeSpamTrash: boolean, Include drafts from SPAM and TRASH in the results.
+  q: string, Only return draft 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:&lt;somemsgid@example.com&gt;
+is:unread"&lt;/code&gt;.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
@@ -271,38 +396,77 @@
     {
     "nextPageToken": "A String", # Token to retrieve the next page of results in the list.
     "resultSizeEstimate": 42, # Estimated total number of results.
-    "drafts": [ # List of drafts.
+    "drafts": [ # List of drafts. Note that the &lt;code&gt;Message&lt;/code&gt; property in each
+        # &lt;code&gt;Draft&lt;/code&gt; resource only contains an &lt;code&gt;id&lt;/code&gt; and a
+        # &lt;code&gt;threadId&lt;/code&gt;. The
+        # &lt;a href="/gmail/api/v1/reference/users/messages/get"&gt;messages.get&lt;/a&gt;
+        # method can fetch additional message details.
       { # A draft email in the user's mailbox.
         "message": { # An email message. # The message content of the draft.
-          "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.
@@ -328,45 +492,82 @@
 </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, existing draft 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, existing draft 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:
 
 { # A draft email in the user's mailbox.
   "message": { # An email message. # The message content of the draft.
-    "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.
@@ -376,40 +577,79 @@
 
   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.
@@ -417,46 +657,82 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(userId, id, body=None, media_body=None, media_mime_type=None)</code>
+    <code class="details" id="update">update(userId, id, body=None, media_body=None, media_mime_type=None, x__xgafv=None)</code>
   <pre>Replaces a draft's content.
 
 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 draft to update. (required)
   body: object, The request body.
     The object takes the form of:
 
 { # A draft email in the user's mailbox.
   "message": { # An email message. # The message content of the draft.
-    "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.
@@ -466,41 +742,80 @@
 
   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:
 
     { # A draft email in the user's mailbox.
     "message": { # An email message. # The message content of the draft.
-      "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.