docs: update generated docs (#981)

diff --git a/docs/dyn/spanner_v1.projects.instances.backups.html b/docs/dyn/spanner_v1.projects.instances.backups.html
index 7cef73f..1c1e78a 100644
--- a/docs/dyn/spanner_v1.projects.instances.backups.html
+++ b/docs/dyn/spanner_v1.projects.instances.backups.html
@@ -92,7 +92,7 @@
   <code><a href="#getIamPolicy">getIamPolicy(resource, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Gets the access control policy for a database or backup resource.</p>
 <p class="toc_element">
-  <code><a href="#list">list(parent, pageSize=None, pageToken=None, filter=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(parent, filter=None, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Lists completed and pending backups.</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
@@ -133,46 +133,46 @@
     The object takes the form of:
 
 { # A backup of a Cloud Spanner database.
-    &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
-        # copy of the database at the timestamp specified by
-        # `create_time`. `create_time` is approximately the time the
-        # CreateBackup request is received.
-    &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
-    &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
-        # Name of the database from which this backup was
-        # created. This needs to be in the same instance as the backup.
-        # Values are of the form
-        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-    &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
-        # operation. The expiration time of the backup, with microseconds
-        # granularity that must be at least 6 hours and at most 366 days
-        # from the time the CreateBackup request is processed. Once the `expire_time`
-        # has passed, the backup is eligible to be automatically deleted by Cloud
-        # Spanner to free the resources used by the backup.
-    &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
-        # The database names are of
-        # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-        # Referencing databases may exist in different instances. The existence of
-        # any referencing database prevents the backup from being deleted. When a
-        # restored database from the backup enters the `READY` state, the reference
-        # to the backup is removed.
-      &quot;A String&quot;,
-    ],
-    &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
-    &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
-        # Required for the UpdateBackup operation.
-        # 
-        # A globally unique identifier for the backup which cannot be
-        # changed. Values are of the form
-        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
-        # The final segment of the name must be between 2 and 60 characters
-        # in length.
-        # 
-        # The backup is stored in the location(s) specified in the instance
-        # configuration of the instance containing the backup, identified
-        # by the prefix of the backup name of the form
-        # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
-  }
+  &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
+      # operation. The expiration time of the backup, with microseconds
+      # granularity that must be at least 6 hours and at most 366 days
+      # from the time the CreateBackup request is processed. Once the `expire_time`
+      # has passed, the backup is eligible to be automatically deleted by Cloud
+      # Spanner to free the resources used by the backup.
+  &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
+      # copy of the database at the timestamp specified by
+      # `create_time`. `create_time` is approximately the time the
+      # CreateBackup request is received.
+  &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
+      # Name of the database from which this backup was
+      # created. This needs to be in the same instance as the backup.
+      # Values are of the form
+      # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+  &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
+  &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
+      # Required for the UpdateBackup operation.
+      # 
+      # A globally unique identifier for the backup which cannot be
+      # changed. Values are of the form
+      # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
+      # The final segment of the name must be between 2 and 60 characters
+      # in length.
+      # 
+      # The backup is stored in the location(s) specified in the instance
+      # configuration of the instance containing the backup, identified
+      # by the prefix of the backup name of the form
+      # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
+  &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
+  &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
+      # The database names are of
+      # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+      # Referencing databases may exist in different instances. The existence of
+      # any referencing database prevents the backup from being deleted. When a
+      # restored database from the backup enters the `READY` state, the reference
+      # to the backup is removed.
+    &quot;A String&quot;,
+  ],
+}
 
   backupId: string, Required. The id of the backup to be created. The `backup_id` appended to
 `parent` forms the full backup name of the form
@@ -187,6 +187,9 @@
 
     { # This resource represents a long-running operation that is the result of a
       # network API call.
+    &quot;name&quot;: &quot;A String&quot;, # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
     &quot;error&quot;: { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
         # different programming environments, including REST APIs and RPC APIs. It is
         # used by [gRPC](https://github.com/grpc). Each `Status` message contains
@@ -194,15 +197,15 @@
         #
         # You can find out more about this error model and how to work with it in the
         # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      &quot;message&quot;: &quot;A String&quot;, # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
       &quot;details&quot;: [ # A list of messages that carry the error details.  There is a common set of
           # message types for APIs to use.
         {
           &quot;a_key&quot;: &quot;&quot;, # Properties of the object. Contains field @type with type URL.
         },
       ],
-      &quot;message&quot;: &quot;A String&quot;, # A developer-facing error message, which should be in English. Any
-          # user-facing error message should be localized and sent in the
-          # google.rpc.Status.details field, or localized by the client.
       &quot;code&quot;: 42, # The status code, which should be an enum value of google.rpc.Code.
     },
     &quot;metadata&quot;: { # Service-specific metadata associated with the operation.  It typically
@@ -211,9 +214,6 @@
         # long-running operation should document the metadata type, if any.
       &quot;a_key&quot;: &quot;&quot;, # Properties of the object. Contains field @type with type URL.
     },
-    &quot;name&quot;: &quot;A String&quot;, # The server-assigned name, which is only unique within the same service that
-        # originally returns it. If you use the default HTTP mapping, the
-        # `name` should be a resource name ending with `operations/{unique_id}`.
     &quot;done&quot;: True or False, # If the value is `false`, it means the operation is still in progress.
         # If `true`, the operation is completed, and either `error` or `response` is
         # available.
@@ -275,46 +275,46 @@
   An object of the form:
 
     { # A backup of a Cloud Spanner database.
-      &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
-          # copy of the database at the timestamp specified by
-          # `create_time`. `create_time` is approximately the time the
-          # CreateBackup request is received.
-      &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
-      &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
-          # Name of the database from which this backup was
-          # created. This needs to be in the same instance as the backup.
-          # Values are of the form
-          # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-      &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
-          # operation. The expiration time of the backup, with microseconds
-          # granularity that must be at least 6 hours and at most 366 days
-          # from the time the CreateBackup request is processed. Once the `expire_time`
-          # has passed, the backup is eligible to be automatically deleted by Cloud
-          # Spanner to free the resources used by the backup.
-      &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
-          # The database names are of
-          # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-          # Referencing databases may exist in different instances. The existence of
-          # any referencing database prevents the backup from being deleted. When a
-          # restored database from the backup enters the `READY` state, the reference
-          # to the backup is removed.
-        &quot;A String&quot;,
-      ],
-      &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
-      &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
-          # Required for the UpdateBackup operation.
-          #
-          # A globally unique identifier for the backup which cannot be
-          # changed. Values are of the form
-          # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
-          # The final segment of the name must be between 2 and 60 characters
-          # in length.
-          #
-          # The backup is stored in the location(s) specified in the instance
-          # configuration of the instance containing the backup, identified
-          # by the prefix of the backup name of the form
-          # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
-    }</pre>
+    &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
+        # operation. The expiration time of the backup, with microseconds
+        # granularity that must be at least 6 hours and at most 366 days
+        # from the time the CreateBackup request is processed. Once the `expire_time`
+        # has passed, the backup is eligible to be automatically deleted by Cloud
+        # Spanner to free the resources used by the backup.
+    &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
+        # copy of the database at the timestamp specified by
+        # `create_time`. `create_time` is approximately the time the
+        # CreateBackup request is received.
+    &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
+        # Name of the database from which this backup was
+        # created. This needs to be in the same instance as the backup.
+        # Values are of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+    &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
+    &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
+        # Required for the UpdateBackup operation.
+        #
+        # A globally unique identifier for the backup which cannot be
+        # changed. Values are of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
+        # The final segment of the name must be between 2 and 60 characters
+        # in length.
+        #
+        # The backup is stored in the location(s) specified in the instance
+        # configuration of the instance containing the backup, identified
+        # by the prefix of the backup name of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
+    &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
+    &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
+        # The database names are of
+        # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+        # Referencing databases may exist in different instances. The existence of
+        # any referencing database prevents the backup from being deleted. When a
+        # restored database from the backup enters the `READY` state, the reference
+        # to the backup is removed.
+      &quot;A String&quot;,
+    ],
+  }</pre>
 </div>
 
 <div class="method">
@@ -432,58 +432,6 @@
       { # Associates `members` with a `role`.
         &quot;role&quot;: &quot;A String&quot;, # Role that is assigned to `members`.
             # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
-        &quot;condition&quot;: { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
-            #
-            # If the condition evaluates to `true`, then this binding applies to the
-            # current request.
-            #
-            # If the condition evaluates to `false`, then this binding does not apply to
-            # the current request. However, a different role binding might grant the same
-            # role to one or more of the members in this binding.
-            #
-            # To learn which resources support conditions in their IAM policies, see the
-            # [IAM
-            # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
-            # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
-            # are documented at https://github.com/google/cel-spec.
-            #
-            # Example (Comparison):
-            #
-            #     title: &quot;Summary size limit&quot;
-            #     description: &quot;Determines if a summary is less than 100 chars&quot;
-            #     expression: &quot;document.summary.size() &lt; 100&quot;
-            #
-            # Example (Equality):
-            #
-            #     title: &quot;Requestor is owner&quot;
-            #     description: &quot;Determines if requestor is the document owner&quot;
-            #     expression: &quot;document.owner == request.auth.claims.email&quot;
-            #
-            # Example (Logic):
-            #
-            #     title: &quot;Public documents&quot;
-            #     description: &quot;Determine whether the document should be publicly visible&quot;
-            #     expression: &quot;document.type != &#x27;private&#x27; &amp;&amp; document.type != &#x27;internal&#x27;&quot;
-            #
-            # Example (Data Manipulation):
-            #
-            #     title: &quot;Notification string&quot;
-            #     description: &quot;Create a notification string with a timestamp.&quot;
-            #     expression: &quot;&#x27;New message received at &#x27; + string(document.create_time)&quot;
-            #
-            # The exact variables and functions that may be referenced within an expression
-            # are determined by the service that evaluates it. See the service
-            # documentation for additional information.
-          &quot;location&quot;: &quot;A String&quot;, # Optional. String indicating the location of the expression for error
-              # reporting, e.g. a file name and a position in the file.
-          &quot;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
-              # syntax.
-          &quot;description&quot;: &quot;A String&quot;, # Optional. Description of the expression. This is a longer text which
-              # describes the expression, e.g. when hovered over it in a UI.
-          &quot;title&quot;: &quot;A String&quot;, # Optional. Title for the expression, i.e. a short string describing
-              # its purpose. This can be used e.g. in UIs which allow to enter the
-              # expression.
-        },
         &quot;members&quot;: [ # Specifies the identities requesting access for a Cloud Platform resource.
             # `members` can have the following values:
             #
@@ -529,20 +477,60 @@
             #
           &quot;A String&quot;,
         ],
+        &quot;condition&quot;: { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
+            #
+            # If the condition evaluates to `true`, then this binding applies to the
+            # current request.
+            #
+            # If the condition evaluates to `false`, then this binding does not apply to
+            # the current request. However, a different role binding might grant the same
+            # role to one or more of the members in this binding.
+            #
+            # To learn which resources support conditions in their IAM policies, see the
+            # [IAM
+            # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
+            # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
+            # are documented at https://github.com/google/cel-spec.
+            #
+            # Example (Comparison):
+            #
+            #     title: &quot;Summary size limit&quot;
+            #     description: &quot;Determines if a summary is less than 100 chars&quot;
+            #     expression: &quot;document.summary.size() &lt; 100&quot;
+            #
+            # Example (Equality):
+            #
+            #     title: &quot;Requestor is owner&quot;
+            #     description: &quot;Determines if requestor is the document owner&quot;
+            #     expression: &quot;document.owner == request.auth.claims.email&quot;
+            #
+            # Example (Logic):
+            #
+            #     title: &quot;Public documents&quot;
+            #     description: &quot;Determine whether the document should be publicly visible&quot;
+            #     expression: &quot;document.type != &#x27;private&#x27; &amp;&amp; document.type != &#x27;internal&#x27;&quot;
+            #
+            # Example (Data Manipulation):
+            #
+            #     title: &quot;Notification string&quot;
+            #     description: &quot;Create a notification string with a timestamp.&quot;
+            #     expression: &quot;&#x27;New message received at &#x27; + string(document.create_time)&quot;
+            #
+            # The exact variables and functions that may be referenced within an expression
+            # are determined by the service that evaluates it. See the service
+            # documentation for additional information.
+          &quot;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
+              # syntax.
+          &quot;description&quot;: &quot;A String&quot;, # Optional. Description of the expression. This is a longer text which
+              # describes the expression, e.g. when hovered over it in a UI.
+          &quot;location&quot;: &quot;A String&quot;, # Optional. String indicating the location of the expression for error
+              # reporting, e.g. a file name and a position in the file.
+          &quot;title&quot;: &quot;A String&quot;, # Optional. Title for the expression, i.e. a short string describing
+              # its purpose. This can be used e.g. in UIs which allow to enter the
+              # expression.
+        },
       },
     ],
-    &quot;etag&quot;: &quot;A String&quot;, # `etag` is used for optimistic concurrency control as a way to help
-        # prevent simultaneous updates of a policy from overwriting each other.
-        # It is strongly suggested that systems make use of the `etag` in the
-        # read-modify-write cycle to perform policy updates in order to avoid race
-        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
-        # systems are expected to put that etag in the request to `setIamPolicy` to
-        # ensure that their change will be applied to the same version of the policy.
-        #
-        # **Important:** If you use IAM Conditions, you must include the `etag` field
-        # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
-        # you to overwrite a version `3` policy with a version `1` policy, and all of
-        # the conditions in the version `3` policy are lost.
     &quot;version&quot;: 42, # Specifies the format of the policy.
         #
         # Valid values are `0`, `1`, and `3`. Requests that specify an invalid value
@@ -567,11 +555,23 @@
         #
         # To learn which resources support conditions in their IAM policies, see the
         # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
+    &quot;etag&quot;: &quot;A String&quot;, # `etag` is used for optimistic concurrency control as a way to help
+        # prevent simultaneous updates of a policy from overwriting each other.
+        # It is strongly suggested that systems make use of the `etag` in the
+        # read-modify-write cycle to perform policy updates in order to avoid race
+        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+        # systems are expected to put that etag in the request to `setIamPolicy` to
+        # ensure that their change will be applied to the same version of the policy.
+        #
+        # **Important:** If you use IAM Conditions, you must include the `etag` field
+        # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
+        # you to overwrite a version `3` policy with a version `1` policy, and all of
+        # the conditions in the version `3` policy are lost.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, filter=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(parent, filter=None, pageSize=None, pageToken=None, x__xgafv=None)</code>
   <pre>Lists completed and pending backups.
 Backups returned are ordered by `create_time` in descending order,
 starting from the most recent `create_time`.
@@ -579,12 +579,6 @@
 Args:
   parent: string, Required. The instance to list backups from.  Values are of the
 form `projects/&lt;project&gt;/instances/&lt;instance&gt;`. (required)
-  pageSize: integer, Number of backups to be returned in the response. If 0 or
-less, defaults to the server&#x27;s maximum allowed page size.
-  pageToken: string, If non-empty, `page_token` should contain a
-next_page_token from a
-previous ListBackupsResponse to the same `parent` and with the same
-`filter`.
   filter: string, An expression that filters the list of returned backups.
 
 A filter expression consists of a field name, a comparison operator, and a
@@ -619,6 +613,12 @@
   * `expire_time &lt; \&quot;2018-03-28T14:50:00Z\&quot;`
          - The backup `expire_time` is before 2018-03-28T14:50:00Z.
   * `size_bytes &gt; 10000000000` - The backup&#x27;s size is greater than 10GB
+  pageSize: integer, Number of backups to be returned in the response. If 0 or
+less, defaults to the server&#x27;s maximum allowed page size.
+  pageToken: string, If non-empty, `page_token` should contain a
+next_page_token from a
+previous ListBackupsResponse to the same `parent` and with the same
+`filter`.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -628,53 +628,53 @@
   An object of the form:
 
     { # The response for ListBackups.
-    &quot;backups&quot;: [ # The list of matching backups. Backups returned are ordered by `create_time`
-        # in descending order, starting from the most recent `create_time`.
-      { # A backup of a Cloud Spanner database.
-          &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
-              # copy of the database at the timestamp specified by
-              # `create_time`. `create_time` is approximately the time the
-              # CreateBackup request is received.
-          &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
-          &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
-              # Name of the database from which this backup was
-              # created. This needs to be in the same instance as the backup.
-              # Values are of the form
-              # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-          &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
-              # operation. The expiration time of the backup, with microseconds
-              # granularity that must be at least 6 hours and at most 366 days
-              # from the time the CreateBackup request is processed. Once the `expire_time`
-              # has passed, the backup is eligible to be automatically deleted by Cloud
-              # Spanner to free the resources used by the backup.
-          &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
-              # The database names are of
-              # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-              # Referencing databases may exist in different instances. The existence of
-              # any referencing database prevents the backup from being deleted. When a
-              # restored database from the backup enters the `READY` state, the reference
-              # to the backup is removed.
-            &quot;A String&quot;,
-          ],
-          &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
-          &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
-              # Required for the UpdateBackup operation.
-              #
-              # A globally unique identifier for the backup which cannot be
-              # changed. Values are of the form
-              # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
-              # The final segment of the name must be between 2 and 60 characters
-              # in length.
-              #
-              # The backup is stored in the location(s) specified in the instance
-              # configuration of the instance containing the backup, identified
-              # by the prefix of the backup name of the form
-              # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
-        },
-    ],
     &quot;nextPageToken&quot;: &quot;A String&quot;, # `next_page_token` can be sent in a subsequent
         # ListBackups call to fetch more
         # of the matching backups.
+    &quot;backups&quot;: [ # The list of matching backups. Backups returned are ordered by `create_time`
+        # in descending order, starting from the most recent `create_time`.
+      { # A backup of a Cloud Spanner database.
+        &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
+            # operation. The expiration time of the backup, with microseconds
+            # granularity that must be at least 6 hours and at most 366 days
+            # from the time the CreateBackup request is processed. Once the `expire_time`
+            # has passed, the backup is eligible to be automatically deleted by Cloud
+            # Spanner to free the resources used by the backup.
+        &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
+            # copy of the database at the timestamp specified by
+            # `create_time`. `create_time` is approximately the time the
+            # CreateBackup request is received.
+        &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
+            # Name of the database from which this backup was
+            # created. This needs to be in the same instance as the backup.
+            # Values are of the form
+            # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+        &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
+        &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
+            # Required for the UpdateBackup operation.
+            #
+            # A globally unique identifier for the backup which cannot be
+            # changed. Values are of the form
+            # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
+            # The final segment of the name must be between 2 and 60 characters
+            # in length.
+            #
+            # The backup is stored in the location(s) specified in the instance
+            # configuration of the instance containing the backup, identified
+            # by the prefix of the backup name of the form
+            # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
+        &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
+        &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
+            # The database names are of
+            # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+            # Referencing databases may exist in different instances. The existence of
+            # any referencing database prevents the backup from being deleted. When a
+            # restored database from the backup enters the `READY` state, the reference
+            # to the backup is removed.
+          &quot;A String&quot;,
+        ],
+      },
+    ],
   }</pre>
 </div>
 
@@ -714,46 +714,46 @@
     The object takes the form of:
 
 { # A backup of a Cloud Spanner database.
-    &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
-        # copy of the database at the timestamp specified by
-        # `create_time`. `create_time` is approximately the time the
-        # CreateBackup request is received.
-    &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
-    &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
-        # Name of the database from which this backup was
-        # created. This needs to be in the same instance as the backup.
-        # Values are of the form
-        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-    &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
-        # operation. The expiration time of the backup, with microseconds
-        # granularity that must be at least 6 hours and at most 366 days
-        # from the time the CreateBackup request is processed. Once the `expire_time`
-        # has passed, the backup is eligible to be automatically deleted by Cloud
-        # Spanner to free the resources used by the backup.
-    &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
-        # The database names are of
-        # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-        # Referencing databases may exist in different instances. The existence of
-        # any referencing database prevents the backup from being deleted. When a
-        # restored database from the backup enters the `READY` state, the reference
-        # to the backup is removed.
-      &quot;A String&quot;,
-    ],
-    &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
-    &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
-        # Required for the UpdateBackup operation.
-        # 
-        # A globally unique identifier for the backup which cannot be
-        # changed. Values are of the form
-        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
-        # The final segment of the name must be between 2 and 60 characters
-        # in length.
-        # 
-        # The backup is stored in the location(s) specified in the instance
-        # configuration of the instance containing the backup, identified
-        # by the prefix of the backup name of the form
-        # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
-  }
+  &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
+      # operation. The expiration time of the backup, with microseconds
+      # granularity that must be at least 6 hours and at most 366 days
+      # from the time the CreateBackup request is processed. Once the `expire_time`
+      # has passed, the backup is eligible to be automatically deleted by Cloud
+      # Spanner to free the resources used by the backup.
+  &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
+      # copy of the database at the timestamp specified by
+      # `create_time`. `create_time` is approximately the time the
+      # CreateBackup request is received.
+  &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
+      # Name of the database from which this backup was
+      # created. This needs to be in the same instance as the backup.
+      # Values are of the form
+      # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+  &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
+  &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
+      # Required for the UpdateBackup operation.
+      # 
+      # A globally unique identifier for the backup which cannot be
+      # changed. Values are of the form
+      # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
+      # The final segment of the name must be between 2 and 60 characters
+      # in length.
+      # 
+      # The backup is stored in the location(s) specified in the instance
+      # configuration of the instance containing the backup, identified
+      # by the prefix of the backup name of the form
+      # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
+  &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
+  &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
+      # The database names are of
+      # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+      # Referencing databases may exist in different instances. The existence of
+      # any referencing database prevents the backup from being deleted. When a
+      # restored database from the backup enters the `READY` state, the reference
+      # to the backup is removed.
+    &quot;A String&quot;,
+  ],
+}
 
   updateMask: string, Required. A mask specifying which fields (e.g. `expire_time`) in the
 Backup resource should be updated. This mask is relative to the Backup
@@ -769,46 +769,46 @@
   An object of the form:
 
     { # A backup of a Cloud Spanner database.
-      &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
-          # copy of the database at the timestamp specified by
-          # `create_time`. `create_time` is approximately the time the
-          # CreateBackup request is received.
-      &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
-      &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
-          # Name of the database from which this backup was
-          # created. This needs to be in the same instance as the backup.
-          # Values are of the form
-          # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-      &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
-          # operation. The expiration time of the backup, with microseconds
-          # granularity that must be at least 6 hours and at most 366 days
-          # from the time the CreateBackup request is processed. Once the `expire_time`
-          # has passed, the backup is eligible to be automatically deleted by Cloud
-          # Spanner to free the resources used by the backup.
-      &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
-          # The database names are of
-          # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
-          # Referencing databases may exist in different instances. The existence of
-          # any referencing database prevents the backup from being deleted. When a
-          # restored database from the backup enters the `READY` state, the reference
-          # to the backup is removed.
-        &quot;A String&quot;,
-      ],
-      &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
-      &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
-          # Required for the UpdateBackup operation.
-          #
-          # A globally unique identifier for the backup which cannot be
-          # changed. Values are of the form
-          # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
-          # The final segment of the name must be between 2 and 60 characters
-          # in length.
-          #
-          # The backup is stored in the location(s) specified in the instance
-          # configuration of the instance containing the backup, identified
-          # by the prefix of the backup name of the form
-          # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
-    }</pre>
+    &quot;expireTime&quot;: &quot;A String&quot;, # Required for the CreateBackup
+        # operation. The expiration time of the backup, with microseconds
+        # granularity that must be at least 6 hours and at most 366 days
+        # from the time the CreateBackup request is processed. Once the `expire_time`
+        # has passed, the backup is eligible to be automatically deleted by Cloud
+        # Spanner to free the resources used by the backup.
+    &quot;createTime&quot;: &quot;A String&quot;, # Output only. The backup will contain an externally consistent
+        # copy of the database at the timestamp specified by
+        # `create_time`. `create_time` is approximately the time the
+        # CreateBackup request is received.
+    &quot;database&quot;: &quot;A String&quot;, # Required for the CreateBackup operation.
+        # Name of the database from which this backup was
+        # created. This needs to be in the same instance as the backup.
+        # Values are of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+    &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the backup.
+    &quot;name&quot;: &quot;A String&quot;, # Output only for the CreateBackup operation.
+        # Required for the UpdateBackup operation.
+        #
+        # A globally unique identifier for the backup which cannot be
+        # changed. Values are of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/backups/a-z*[a-z0-9]`
+        # The final segment of the name must be between 2 and 60 characters
+        # in length.
+        #
+        # The backup is stored in the location(s) specified in the instance
+        # configuration of the instance containing the backup, identified
+        # by the prefix of the backup name of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
+    &quot;sizeBytes&quot;: &quot;A String&quot;, # Output only. Size of the backup in bytes.
+    &quot;referencingDatabases&quot;: [ # Output only. The names of the restored databases that reference the backup.
+        # The database names are of
+        # the form `projects/&lt;project&gt;/instances/&lt;instance&gt;/databases/&lt;database&gt;`.
+        # Referencing databases may exist in different instances. The existence of
+        # any referencing database prevents the backup from being deleted. When a
+        # restored database from the backup enters the `READY` state, the reference
+        # to the backup is removed.
+      &quot;A String&quot;,
+    ],
+  }</pre>
 </div>
 
 <div class="method">
@@ -903,58 +903,6 @@
         { # Associates `members` with a `role`.
           &quot;role&quot;: &quot;A String&quot;, # Role that is assigned to `members`.
               # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
-          &quot;condition&quot;: { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
-              #
-              # If the condition evaluates to `true`, then this binding applies to the
-              # current request.
-              #
-              # If the condition evaluates to `false`, then this binding does not apply to
-              # the current request. However, a different role binding might grant the same
-              # role to one or more of the members in this binding.
-              #
-              # To learn which resources support conditions in their IAM policies, see the
-              # [IAM
-              # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
-              # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
-              # are documented at https://github.com/google/cel-spec.
-              #
-              # Example (Comparison):
-              #
-              #     title: &quot;Summary size limit&quot;
-              #     description: &quot;Determines if a summary is less than 100 chars&quot;
-              #     expression: &quot;document.summary.size() &lt; 100&quot;
-              #
-              # Example (Equality):
-              #
-              #     title: &quot;Requestor is owner&quot;
-              #     description: &quot;Determines if requestor is the document owner&quot;
-              #     expression: &quot;document.owner == request.auth.claims.email&quot;
-              #
-              # Example (Logic):
-              #
-              #     title: &quot;Public documents&quot;
-              #     description: &quot;Determine whether the document should be publicly visible&quot;
-              #     expression: &quot;document.type != &#x27;private&#x27; &amp;&amp; document.type != &#x27;internal&#x27;&quot;
-              #
-              # Example (Data Manipulation):
-              #
-              #     title: &quot;Notification string&quot;
-              #     description: &quot;Create a notification string with a timestamp.&quot;
-              #     expression: &quot;&#x27;New message received at &#x27; + string(document.create_time)&quot;
-              #
-              # The exact variables and functions that may be referenced within an expression
-              # are determined by the service that evaluates it. See the service
-              # documentation for additional information.
-            &quot;location&quot;: &quot;A String&quot;, # Optional. String indicating the location of the expression for error
-                # reporting, e.g. a file name and a position in the file.
-            &quot;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
-                # syntax.
-            &quot;description&quot;: &quot;A String&quot;, # Optional. Description of the expression. This is a longer text which
-                # describes the expression, e.g. when hovered over it in a UI.
-            &quot;title&quot;: &quot;A String&quot;, # Optional. Title for the expression, i.e. a short string describing
-                # its purpose. This can be used e.g. in UIs which allow to enter the
-                # expression.
-          },
           &quot;members&quot;: [ # Specifies the identities requesting access for a Cloud Platform resource.
               # `members` can have the following values:
               #
@@ -1000,20 +948,60 @@
               #
             &quot;A String&quot;,
           ],
+          &quot;condition&quot;: { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
+              #
+              # If the condition evaluates to `true`, then this binding applies to the
+              # current request.
+              #
+              # If the condition evaluates to `false`, then this binding does not apply to
+              # the current request. However, a different role binding might grant the same
+              # role to one or more of the members in this binding.
+              #
+              # To learn which resources support conditions in their IAM policies, see the
+              # [IAM
+              # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
+              # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
+              # are documented at https://github.com/google/cel-spec.
+              #
+              # Example (Comparison):
+              #
+              #     title: &quot;Summary size limit&quot;
+              #     description: &quot;Determines if a summary is less than 100 chars&quot;
+              #     expression: &quot;document.summary.size() &lt; 100&quot;
+              #
+              # Example (Equality):
+              #
+              #     title: &quot;Requestor is owner&quot;
+              #     description: &quot;Determines if requestor is the document owner&quot;
+              #     expression: &quot;document.owner == request.auth.claims.email&quot;
+              #
+              # Example (Logic):
+              #
+              #     title: &quot;Public documents&quot;
+              #     description: &quot;Determine whether the document should be publicly visible&quot;
+              #     expression: &quot;document.type != &#x27;private&#x27; &amp;&amp; document.type != &#x27;internal&#x27;&quot;
+              #
+              # Example (Data Manipulation):
+              #
+              #     title: &quot;Notification string&quot;
+              #     description: &quot;Create a notification string with a timestamp.&quot;
+              #     expression: &quot;&#x27;New message received at &#x27; + string(document.create_time)&quot;
+              #
+              # The exact variables and functions that may be referenced within an expression
+              # are determined by the service that evaluates it. See the service
+              # documentation for additional information.
+            &quot;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
+                # syntax.
+            &quot;description&quot;: &quot;A String&quot;, # Optional. Description of the expression. This is a longer text which
+                # describes the expression, e.g. when hovered over it in a UI.
+            &quot;location&quot;: &quot;A String&quot;, # Optional. String indicating the location of the expression for error
+                # reporting, e.g. a file name and a position in the file.
+            &quot;title&quot;: &quot;A String&quot;, # Optional. Title for the expression, i.e. a short string describing
+                # its purpose. This can be used e.g. in UIs which allow to enter the
+                # expression.
+          },
         },
       ],
-      &quot;etag&quot;: &quot;A String&quot;, # `etag` is used for optimistic concurrency control as a way to help
-          # prevent simultaneous updates of a policy from overwriting each other.
-          # It is strongly suggested that systems make use of the `etag` in the
-          # read-modify-write cycle to perform policy updates in order to avoid race
-          # conditions: An `etag` is returned in the response to `getIamPolicy`, and
-          # systems are expected to put that etag in the request to `setIamPolicy` to
-          # ensure that their change will be applied to the same version of the policy.
-          #
-          # **Important:** If you use IAM Conditions, you must include the `etag` field
-          # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
-          # you to overwrite a version `3` policy with a version `1` policy, and all of
-          # the conditions in the version `3` policy are lost.
       &quot;version&quot;: 42, # Specifies the format of the policy.
           #
           # Valid values are `0`, `1`, and `3`. Requests that specify an invalid value
@@ -1038,6 +1026,18 @@
           #
           # To learn which resources support conditions in their IAM policies, see the
           # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
+      &quot;etag&quot;: &quot;A String&quot;, # `etag` is used for optimistic concurrency control as a way to help
+          # prevent simultaneous updates of a policy from overwriting each other.
+          # It is strongly suggested that systems make use of the `etag` in the
+          # read-modify-write cycle to perform policy updates in order to avoid race
+          # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+          # systems are expected to put that etag in the request to `setIamPolicy` to
+          # ensure that their change will be applied to the same version of the policy.
+          #
+          # **Important:** If you use IAM Conditions, you must include the `etag` field
+          # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
+          # you to overwrite a version `3` policy with a version `1` policy, and all of
+          # the conditions in the version `3` policy are lost.
     },
   }
 
@@ -1122,58 +1122,6 @@
       { # Associates `members` with a `role`.
         &quot;role&quot;: &quot;A String&quot;, # Role that is assigned to `members`.
             # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
-        &quot;condition&quot;: { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
-            #
-            # If the condition evaluates to `true`, then this binding applies to the
-            # current request.
-            #
-            # If the condition evaluates to `false`, then this binding does not apply to
-            # the current request. However, a different role binding might grant the same
-            # role to one or more of the members in this binding.
-            #
-            # To learn which resources support conditions in their IAM policies, see the
-            # [IAM
-            # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
-            # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
-            # are documented at https://github.com/google/cel-spec.
-            #
-            # Example (Comparison):
-            #
-            #     title: &quot;Summary size limit&quot;
-            #     description: &quot;Determines if a summary is less than 100 chars&quot;
-            #     expression: &quot;document.summary.size() &lt; 100&quot;
-            #
-            # Example (Equality):
-            #
-            #     title: &quot;Requestor is owner&quot;
-            #     description: &quot;Determines if requestor is the document owner&quot;
-            #     expression: &quot;document.owner == request.auth.claims.email&quot;
-            #
-            # Example (Logic):
-            #
-            #     title: &quot;Public documents&quot;
-            #     description: &quot;Determine whether the document should be publicly visible&quot;
-            #     expression: &quot;document.type != &#x27;private&#x27; &amp;&amp; document.type != &#x27;internal&#x27;&quot;
-            #
-            # Example (Data Manipulation):
-            #
-            #     title: &quot;Notification string&quot;
-            #     description: &quot;Create a notification string with a timestamp.&quot;
-            #     expression: &quot;&#x27;New message received at &#x27; + string(document.create_time)&quot;
-            #
-            # The exact variables and functions that may be referenced within an expression
-            # are determined by the service that evaluates it. See the service
-            # documentation for additional information.
-          &quot;location&quot;: &quot;A String&quot;, # Optional. String indicating the location of the expression for error
-              # reporting, e.g. a file name and a position in the file.
-          &quot;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
-              # syntax.
-          &quot;description&quot;: &quot;A String&quot;, # Optional. Description of the expression. This is a longer text which
-              # describes the expression, e.g. when hovered over it in a UI.
-          &quot;title&quot;: &quot;A String&quot;, # Optional. Title for the expression, i.e. a short string describing
-              # its purpose. This can be used e.g. in UIs which allow to enter the
-              # expression.
-        },
         &quot;members&quot;: [ # Specifies the identities requesting access for a Cloud Platform resource.
             # `members` can have the following values:
             #
@@ -1219,20 +1167,60 @@
             #
           &quot;A String&quot;,
         ],
+        &quot;condition&quot;: { # Represents a textual expression in the Common Expression Language (CEL) # The condition that is associated with this binding.
+            #
+            # If the condition evaluates to `true`, then this binding applies to the
+            # current request.
+            #
+            # If the condition evaluates to `false`, then this binding does not apply to
+            # the current request. However, a different role binding might grant the same
+            # role to one or more of the members in this binding.
+            #
+            # To learn which resources support conditions in their IAM policies, see the
+            # [IAM
+            # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
+            # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
+            # are documented at https://github.com/google/cel-spec.
+            #
+            # Example (Comparison):
+            #
+            #     title: &quot;Summary size limit&quot;
+            #     description: &quot;Determines if a summary is less than 100 chars&quot;
+            #     expression: &quot;document.summary.size() &lt; 100&quot;
+            #
+            # Example (Equality):
+            #
+            #     title: &quot;Requestor is owner&quot;
+            #     description: &quot;Determines if requestor is the document owner&quot;
+            #     expression: &quot;document.owner == request.auth.claims.email&quot;
+            #
+            # Example (Logic):
+            #
+            #     title: &quot;Public documents&quot;
+            #     description: &quot;Determine whether the document should be publicly visible&quot;
+            #     expression: &quot;document.type != &#x27;private&#x27; &amp;&amp; document.type != &#x27;internal&#x27;&quot;
+            #
+            # Example (Data Manipulation):
+            #
+            #     title: &quot;Notification string&quot;
+            #     description: &quot;Create a notification string with a timestamp.&quot;
+            #     expression: &quot;&#x27;New message received at &#x27; + string(document.create_time)&quot;
+            #
+            # The exact variables and functions that may be referenced within an expression
+            # are determined by the service that evaluates it. See the service
+            # documentation for additional information.
+          &quot;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
+              # syntax.
+          &quot;description&quot;: &quot;A String&quot;, # Optional. Description of the expression. This is a longer text which
+              # describes the expression, e.g. when hovered over it in a UI.
+          &quot;location&quot;: &quot;A String&quot;, # Optional. String indicating the location of the expression for error
+              # reporting, e.g. a file name and a position in the file.
+          &quot;title&quot;: &quot;A String&quot;, # Optional. Title for the expression, i.e. a short string describing
+              # its purpose. This can be used e.g. in UIs which allow to enter the
+              # expression.
+        },
       },
     ],
-    &quot;etag&quot;: &quot;A String&quot;, # `etag` is used for optimistic concurrency control as a way to help
-        # prevent simultaneous updates of a policy from overwriting each other.
-        # It is strongly suggested that systems make use of the `etag` in the
-        # read-modify-write cycle to perform policy updates in order to avoid race
-        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
-        # systems are expected to put that etag in the request to `setIamPolicy` to
-        # ensure that their change will be applied to the same version of the policy.
-        #
-        # **Important:** If you use IAM Conditions, you must include the `etag` field
-        # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
-        # you to overwrite a version `3` policy with a version `1` policy, and all of
-        # the conditions in the version `3` policy are lost.
     &quot;version&quot;: 42, # Specifies the format of the policy.
         #
         # Valid values are `0`, `1`, and `3`. Requests that specify an invalid value
@@ -1257,6 +1245,18 @@
         #
         # To learn which resources support conditions in their IAM policies, see the
         # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
+    &quot;etag&quot;: &quot;A String&quot;, # `etag` is used for optimistic concurrency control as a way to help
+        # prevent simultaneous updates of a policy from overwriting each other.
+        # It is strongly suggested that systems make use of the `etag` in the
+        # read-modify-write cycle to perform policy updates in order to avoid race
+        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+        # systems are expected to put that etag in the request to `setIamPolicy` to
+        # ensure that their change will be applied to the same version of the policy.
+        #
+        # **Important:** If you use IAM Conditions, you must include the `etag` field
+        # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
+        # you to overwrite a version `3` policy with a version `1` policy, and all of
+        # the conditions in the version `3` policy are lost.
   }</pre>
 </div>