docs: update docs (#916)

* fix: re-run script

* test: fix noxfile
diff --git a/docs/dyn/spanner_v1.projects.instances.backups.html b/docs/dyn/spanner_v1.projects.instances.backups.html
index af4f04a..7cef73f 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, pageToken=None, pageSize=None, filter=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(parent, pageSize=None, pageToken=None, filter=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;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;,
-  ],
-  &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;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;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;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;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;`.
+  }
 
   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 +187,33 @@
 
     { # This resource represents a long-running operation that is the result of a
       # network API call.
+    &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
+        # three pieces of data: error code, error message, and error details.
+        #
+        # 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;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
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # 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.
@@ -200,33 +227,6 @@
         # `TakeSnapshotResponse`.
       &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;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
-        # three pieces of data: error code, error message, and error details.
-        #
-        # 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;code&quot;: 42, # The status code, which should be an enum value of google.rpc.Code.
-      &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;metadata&quot;: { # Service-specific metadata associated with the operation.  It typically
-        # contains progress information and common metadata such as create time.
-        # Some services might not provide such metadata.  Any method that returns a
-        # 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.
-    },
   }</pre>
 </div>
 
@@ -275,46 +275,46 @@
   An object of the form:
 
     { # A backup of a Cloud Spanner database.
-    &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;,
-    ],
-    &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;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;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;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;`.
-  }</pre>
+      &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>
 </div>
 
 <div class="method">
@@ -344,6 +344,10 @@
           # Requests for policies with any conditional bindings must specify version 3.
           # Policies without any conditional bindings may specify any valid value or
           # leave the field unset.
+          #
+          # To learn which resources support conditions in their IAM policies, see the
+          # [IAM
+          # documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
     },
   }
 
@@ -365,10 +369,12 @@
       # permissions; each `role` can be an IAM predefined role or a user-created
       # custom role.
       #
-      # Optionally, a `binding` can specify a `condition`, which is a logical
-      # expression that allows access to a resource only if the expression evaluates
-      # to `true`. A condition can add constraints based on attributes of the
-      # request, the resource, or both.
+      # For some types of Google Cloud resources, a `binding` can also specify a
+      # `condition`, which is a logical expression that allows access to a resource
+      # only if the expression evaluates to `true`. A condition can add constraints
+      # based on attributes of the request, the resource, or both. To learn which
+      # resources support conditions in their IAM policies, see the
+      # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
       #
       # **JSON example:**
       #
@@ -385,7 +391,9 @@
       #         },
       #         {
       #           &quot;role&quot;: &quot;roles/resourcemanager.organizationViewer&quot;,
-      #           &quot;members&quot;: [&quot;user:eve@example.com&quot;],
+      #           &quot;members&quot;: [
+      #             &quot;user:eve@example.com&quot;
+      #           ],
       #           &quot;condition&quot;: {
       #             &quot;title&quot;: &quot;expirable access&quot;,
       #             &quot;description&quot;: &quot;Does not grant access after Sep 2020&quot;,
@@ -418,47 +426,24 @@
       #
       # For a description of IAM and its features, see the
       # [IAM documentation](https://cloud.google.com/iam/docs/).
-    &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
-        # are rejected.
-        #
-        # Any operation that affects conditional role bindings must specify version
-        # `3`. This requirement applies to the following operations:
-        #
-        # * Getting a policy that includes a conditional role binding
-        # * Adding a conditional role binding to a policy
-        # * Changing a conditional role binding in a policy
-        # * Removing any role binding, with or without a condition, from a policy
-        #   that includes conditions
-        #
-        # **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.
-        #
-        # If a policy does not include any conditions, operations on that policy may
-        # specify any valid version or leave the field unset.
     &quot;bindings&quot;: [ # Associates a list of `members` to a `role`. Optionally, may specify a
         # `condition` that determines how and when the `bindings` are applied. Each
         # of the `bindings` must contain at least one member.
       { # 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.
-            # NOTE: An unsatisfied condition will not allow user access via current
-            # binding. Different bindings, including their conditions, are examined
-            # independently.
+            #
+            # 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.
             #
@@ -491,13 +476,13 @@
             # 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;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;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
-              # syntax.
         },
         &quot;members&quot;: [ # Specifies the identities requesting access for a Cloud Platform resource.
             # `members` can have the following values:
@@ -544,15 +529,49 @@
             #
           &quot;A String&quot;,
         ],
-        &quot;role&quot;: &quot;A String&quot;, # Role that is assigned to `members`.
-            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
       },
     ],
+    &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
+        # are rejected.
+        #
+        # Any operation that affects conditional role bindings must specify version
+        # `3`. This requirement applies to the following operations:
+        #
+        # * Getting a policy that includes a conditional role binding
+        # * Adding a conditional role binding to a policy
+        # * Changing a conditional role binding in a policy
+        # * Removing any role binding, with or without a condition, from a policy
+        #   that includes conditions
+        #
+        # **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.
+        #
+        # If a policy does not include any conditions, operations on that policy may
+        # specify any valid version or leave the field unset.
+        #
+        # To learn which resources support conditions in their IAM policies, see the
+        # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(parent, pageToken=None, pageSize=None, filter=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, filter=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`.
@@ -560,12 +579,12 @@
 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`.
-  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.
   filter: string, An expression that filters the list of returned backups.
 
 A filter expression consists of a field name, a comparison operator, and a
@@ -612,46 +631,46 @@
     &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;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;,
-        ],
-        &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;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;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;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;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
@@ -695,46 +714,46 @@
     The object takes the form of:
 
 { # A backup of a Cloud Spanner database.
-  &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;,
-  ],
-  &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;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;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;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;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;`.
+  }
 
   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
@@ -750,46 +769,46 @@
   An object of the form:
 
     { # A backup of a Cloud Spanner database.
-    &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;,
-    ],
-    &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;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;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;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;`.
-  }</pre>
+      &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>
 </div>
 
 <div class="method">
@@ -821,10 +840,12 @@
         # permissions; each `role` can be an IAM predefined role or a user-created
         # custom role.
         #
-        # Optionally, a `binding` can specify a `condition`, which is a logical
-        # expression that allows access to a resource only if the expression evaluates
-        # to `true`. A condition can add constraints based on attributes of the
-        # request, the resource, or both.
+        # For some types of Google Cloud resources, a `binding` can also specify a
+        # `condition`, which is a logical expression that allows access to a resource
+        # only if the expression evaluates to `true`. A condition can add constraints
+        # based on attributes of the request, the resource, or both. To learn which
+        # resources support conditions in their IAM policies, see the
+        # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
         #
         # **JSON example:**
         #
@@ -841,7 +862,9 @@
         #         },
         #         {
         #           &quot;role&quot;: &quot;roles/resourcemanager.organizationViewer&quot;,
-        #           &quot;members&quot;: [&quot;user:eve@example.com&quot;],
+        #           &quot;members&quot;: [
+        #             &quot;user:eve@example.com&quot;
+        #           ],
         #           &quot;condition&quot;: {
         #             &quot;title&quot;: &quot;expirable access&quot;,
         #             &quot;description&quot;: &quot;Does not grant access after Sep 2020&quot;,
@@ -874,47 +897,24 @@
         #
         # For a description of IAM and its features, see the
         # [IAM documentation](https://cloud.google.com/iam/docs/).
-      &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
-          # are rejected.
-          #
-          # Any operation that affects conditional role bindings must specify version
-          # `3`. This requirement applies to the following operations:
-          #
-          # * Getting a policy that includes a conditional role binding
-          # * Adding a conditional role binding to a policy
-          # * Changing a conditional role binding in a policy
-          # * Removing any role binding, with or without a condition, from a policy
-          #   that includes conditions
-          #
-          # **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.
-          #
-          # If a policy does not include any conditions, operations on that policy may
-          # specify any valid version or leave the field unset.
       &quot;bindings&quot;: [ # Associates a list of `members` to a `role`. Optionally, may specify a
           # `condition` that determines how and when the `bindings` are applied. Each
           # of the `bindings` must contain at least one member.
         { # 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.
-              # NOTE: An unsatisfied condition will not allow user access via current
-              # binding. Different bindings, including their conditions, are examined
-              # independently.
+              #
+              # 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.
               #
@@ -947,13 +947,13 @@
               # 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;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;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
-                # syntax.
           },
           &quot;members&quot;: [ # Specifies the identities requesting access for a Cloud Platform resource.
               # `members` can have the following values:
@@ -1000,10 +1000,44 @@
               #
             &quot;A String&quot;,
           ],
-          &quot;role&quot;: &quot;A String&quot;, # Role that is assigned to `members`.
-              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
         },
       ],
+      &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
+          # are rejected.
+          #
+          # Any operation that affects conditional role bindings must specify version
+          # `3`. This requirement applies to the following operations:
+          #
+          # * Getting a policy that includes a conditional role binding
+          # * Adding a conditional role binding to a policy
+          # * Changing a conditional role binding in a policy
+          # * Removing any role binding, with or without a condition, from a policy
+          #   that includes conditions
+          #
+          # **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.
+          #
+          # If a policy does not include any conditions, operations on that policy may
+          # specify any valid version or leave the field unset.
+          #
+          # To learn which resources support conditions in their IAM policies, see the
+          # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
     },
   }
 
@@ -1025,10 +1059,12 @@
       # permissions; each `role` can be an IAM predefined role or a user-created
       # custom role.
       #
-      # Optionally, a `binding` can specify a `condition`, which is a logical
-      # expression that allows access to a resource only if the expression evaluates
-      # to `true`. A condition can add constraints based on attributes of the
-      # request, the resource, or both.
+      # For some types of Google Cloud resources, a `binding` can also specify a
+      # `condition`, which is a logical expression that allows access to a resource
+      # only if the expression evaluates to `true`. A condition can add constraints
+      # based on attributes of the request, the resource, or both. To learn which
+      # resources support conditions in their IAM policies, see the
+      # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
       #
       # **JSON example:**
       #
@@ -1045,7 +1081,9 @@
       #         },
       #         {
       #           &quot;role&quot;: &quot;roles/resourcemanager.organizationViewer&quot;,
-      #           &quot;members&quot;: [&quot;user:eve@example.com&quot;],
+      #           &quot;members&quot;: [
+      #             &quot;user:eve@example.com&quot;
+      #           ],
       #           &quot;condition&quot;: {
       #             &quot;title&quot;: &quot;expirable access&quot;,
       #             &quot;description&quot;: &quot;Does not grant access after Sep 2020&quot;,
@@ -1078,47 +1116,24 @@
       #
       # For a description of IAM and its features, see the
       # [IAM documentation](https://cloud.google.com/iam/docs/).
-    &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
-        # are rejected.
-        #
-        # Any operation that affects conditional role bindings must specify version
-        # `3`. This requirement applies to the following operations:
-        #
-        # * Getting a policy that includes a conditional role binding
-        # * Adding a conditional role binding to a policy
-        # * Changing a conditional role binding in a policy
-        # * Removing any role binding, with or without a condition, from a policy
-        #   that includes conditions
-        #
-        # **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.
-        #
-        # If a policy does not include any conditions, operations on that policy may
-        # specify any valid version or leave the field unset.
     &quot;bindings&quot;: [ # Associates a list of `members` to a `role`. Optionally, may specify a
         # `condition` that determines how and when the `bindings` are applied. Each
         # of the `bindings` must contain at least one member.
       { # 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.
-            # NOTE: An unsatisfied condition will not allow user access via current
-            # binding. Different bindings, including their conditions, are examined
-            # independently.
+            #
+            # 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.
             #
@@ -1151,13 +1166,13 @@
             # 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;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;expression&quot;: &quot;A String&quot;, # Textual representation of an expression in Common Expression Language
-              # syntax.
         },
         &quot;members&quot;: [ # Specifies the identities requesting access for a Cloud Platform resource.
             # `members` can have the following values:
@@ -1204,10 +1219,44 @@
             #
           &quot;A String&quot;,
         ],
-        &quot;role&quot;: &quot;A String&quot;, # Role that is assigned to `members`.
-            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
       },
     ],
+    &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
+        # are rejected.
+        #
+        # Any operation that affects conditional role bindings must specify version
+        # `3`. This requirement applies to the following operations:
+        #
+        # * Getting a policy that includes a conditional role binding
+        # * Adding a conditional role binding to a policy
+        # * Changing a conditional role binding in a policy
+        # * Removing any role binding, with or without a condition, from a policy
+        #   that includes conditions
+        #
+        # **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.
+        #
+        # If a policy does not include any conditions, operations on that policy may
+        # specify any valid version or leave the field unset.
+        #
+        # To learn which resources support conditions in their IAM policies, see the
+        # [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).
   }</pre>
 </div>