chore: regens API reference docs (#889)

diff --git a/docs/dyn/gmail_v1.users.threads.html b/docs/dyn/gmail_v1.users.threads.html
index ce96c73..465ad26 100644
--- a/docs/dyn/gmail_v1.users.threads.html
+++ b/docs/dyn/gmail_v1.users.threads.html
@@ -75,49 +75,56 @@
 <h1><a href="gmail_v1.html">Gmail API</a> . <a href="gmail_v1.users.html">users</a> . <a href="gmail_v1.users.threads.html">threads</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#delete">delete(userId, id)</a></code></p>
-<p class="firstline">Immediately and permanently deletes the specified thread. This operation cannot be undone. Prefer threads.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 thread. 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 thread.</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 threads 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>
-<p class="firstline">Modifies the labels applied to the thread. This applies to all messages in the thread.</p>
+  <code><a href="#modify">modify(userId, id, body=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Modifies the labels applied to the thread. This applies to all messages</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 thread 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 thread from the trash.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="delete">delete(userId, id)</code>
-  <pre>Immediately and permanently deletes the specified thread. This operation cannot be undone. Prefer threads.trash instead.
+    <code class="details" id="delete">delete(userId, id, x__xgafv=None)</code>
+  <pre>Immediately and permanently deletes the specified thread. This operation
+cannot be undone. Prefer &lt;code&gt;threads.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, ID of the Thread 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 thread.
 
 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 thread to retrieve. (required)
   format: string, The format to return the messages in.
+  x__xgafv: string, V1 error format.
     Allowed values
-      full - 
-      metadata - 
-      minimal - 
+      1 - v1 error format
+      2 - v2 error format
   metadataHeaders: string, When given and format is METADATA, only include headers specified. (repeated)
 
 Returns:
@@ -127,35 +134,70 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # 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.
@@ -167,16 +209,26 @@
 </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 threads 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 threads with labels that match all of the specified label IDs. (repeated)
-  q: string, Only return threads matching the specified query. Supports the same query format as the Gmail search box. For example, "from:someuser@example.com rfc822msgid: 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 threads from &lt;code&gt;SPAM&lt;/code&gt; and &lt;code&gt;TRASH&lt;/code&gt;
+in the results.
   maxResults: integer, Maximum number of threads to return.
-  includeSpamTrash: boolean, Include threads from SPAM and TRASH in the results.
+  q: string, Only return threads 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;. 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:
@@ -184,40 +236,78 @@
     {
     "nextPageToken": "A String", # Page token to retrieve the next page of results in the list.
     "resultSizeEstimate": 42, # Estimated total number of results.
-    "threads": [ # List of threads. Note that each thread resource does not contain a list of messages. The list of messages for a given thread can be fetched using the threads.get method.
+    "threads": [ # List of threads. Note that each thread resource does not contain a list of
+        # &lt;code&gt;messages&lt;/code&gt;. The list of &lt;code&gt;messages&lt;/code&gt; for a given thread
+        # can be fetched using the
+        # &lt;a href="/gmail/api/v1/reference/users/threads/get"&gt;threads.get&lt;/a&gt; method.
       { # A collection of messages representing a conversation.
         "snippet": "A String", # A short part of the message text.
         "messages": [ # The list of messages in the thread.
           { # 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.
@@ -245,13 +335,15 @@
 </div>
 
 <div class="method">
-    <code class="details" id="modify">modify(userId, id, body)</code>
-  <pre>Modifies the labels applied to the thread. This applies to all messages in the thread.
+    <code class="details" id="modify">modify(userId, id, body=None, x__xgafv=None)</code>
+  <pre>Modifies the labels applied to the thread. This applies to all messages
+in the thread.
 
 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 thread to modify. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {
@@ -263,6 +355,10 @@
     ],
   }
 
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
 
 Returns:
   An object of the form:
@@ -271,35 +367,70 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # 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.
@@ -311,12 +442,17 @@
 </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 thread 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 thread 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:
@@ -325,35 +461,70 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # 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.
@@ -365,12 +536,17 @@
 </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 thread 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 thread 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:
@@ -379,35 +555,70 @@
     "snippet": "A String", # A short part of the message text.
     "messages": [ # The list of messages in the thread.
       { # 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.