docs: update generated docs (#981)

diff --git a/docs/dyn/bigtableadmin_v2.projects.instances.clusters.html b/docs/dyn/bigtableadmin_v2.projects.instances.clusters.html
index e123727..5cf5a36 100644
--- a/docs/dyn/bigtableadmin_v2.projects.instances.clusters.html
+++ b/docs/dyn/bigtableadmin_v2.projects.instances.clusters.html
@@ -112,21 +112,17 @@
 { # A resizable group of nodes in a particular cloud location, capable
     # of serving all Tables in the parent
     # Instance.
-  "name": "A String", # Required. (`OutputOnly`)
-      # The unique name of the cluster. Values are of the form
-      # `projects/{project}/instances/{instance}/clusters/a-z*`.
-  "serveNodes": 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
-      # throughput and more consistent performance.
-  "defaultStorageType": "A String", # (`CreationOnly`)
-      # The type of storage used by this cluster to serve its
-      # parent instance's tables, unless explicitly overridden.
-  "location": "A String", # (`CreationOnly`)
-      # The location where this cluster's nodes and storage reside. For best
+  "location": "A String", # Immutable. The location where this cluster's nodes and storage reside. For best
       # performance, clients should be located as close as possible to this
       # cluster. Currently only zones are supported, so values should be of the
       # form `projects/{project}/locations/{zone}`.
-  "state": "A String", # (`OutputOnly`)
-      # The current state of the cluster.
+  "name": "A String", # The unique name of the cluster. Values are of the form
+      # `projects/{project}/instances/{instance}/clusters/a-z*`.
+  "defaultStorageType": "A String", # Immutable. The type of storage used by this cluster to serve its
+      # parent instance's tables, unless explicitly overridden.
+  "serveNodes": 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
+      # throughput and more consistent performance.
+  "state": "A String", # Output only. The current state of the cluster.
 }
 
   clusterId: string, Required. The ID to be used when referring to the new cluster within its instance,
@@ -142,6 +138,30 @@
 
     { # This resource represents a long-running operation that is the result of a
       # network API call.
+    "metadata": { # 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.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "error": { # 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).
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+      "message": "A String", # 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.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+    },
     "response": { # The normal response of the operation in case of success.  If the original
         # method returns no data on success, such as `Delete`, the response is
         # `google.protobuf.Empty`.  If the original method is standard
@@ -155,30 +175,6 @@
     "name": "A String", # 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}`.
-    "error": { # 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).
-      "message": "A String", # 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.
-      "details": [ # A list of messages that carry the error details.  There is a common set of
-          # message types for APIs to use.
-        {
-          "a_key": "", # Properties of the object. Contains field @type with type URL.
-        },
-      ],
-      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
-    },
-    "metadata": { # 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.
-      "a_key": "", # Properties of the object. Contains field @type with type URL.
-    },
     "done": 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.
@@ -230,21 +226,17 @@
     { # A resizable group of nodes in a particular cloud location, capable
       # of serving all Tables in the parent
       # Instance.
-    "name": "A String", # Required. (`OutputOnly`)
-        # The unique name of the cluster. Values are of the form
-        # `projects/{project}/instances/{instance}/clusters/a-z*`.
-    "serveNodes": 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
-        # throughput and more consistent performance.
-    "defaultStorageType": "A String", # (`CreationOnly`)
-        # The type of storage used by this cluster to serve its
-        # parent instance's tables, unless explicitly overridden.
-    "location": "A String", # (`CreationOnly`)
-        # The location where this cluster's nodes and storage reside. For best
+    "location": "A String", # Immutable. The location where this cluster's nodes and storage reside. For best
         # performance, clients should be located as close as possible to this
         # cluster. Currently only zones are supported, so values should be of the
         # form `projects/{project}/locations/{zone}`.
-    "state": "A String", # (`OutputOnly`)
-        # The current state of the cluster.
+    "name": "A String", # The unique name of the cluster. Values are of the form
+        # `projects/{project}/instances/{instance}/clusters/a-z*`.
+    "defaultStorageType": "A String", # Immutable. The type of storage used by this cluster to serve its
+        # parent instance's tables, unless explicitly overridden.
+    "serveNodes": 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
+        # throughput and more consistent performance.
+    "state": "A String", # Output only. The current state of the cluster.
   }</pre>
 </div>
 
@@ -267,27 +259,6 @@
   An object of the form:
 
     { # Response message for BigtableInstanceAdmin.ListClusters.
-    &quot;clusters&quot;: [ # The list of requested clusters.
-      { # A resizable group of nodes in a particular cloud location, capable
-          # of serving all Tables in the parent
-          # Instance.
-        &quot;name&quot;: &quot;A String&quot;, # Required. (`OutputOnly`)
-            # The unique name of the cluster. Values are of the form
-            # `projects/{project}/instances/{instance}/clusters/a-z*`.
-        &quot;serveNodes&quot;: 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
-            # throughput and more consistent performance.
-        &quot;defaultStorageType&quot;: &quot;A String&quot;, # (`CreationOnly`)
-            # The type of storage used by this cluster to serve its
-            # parent instance&#x27;s tables, unless explicitly overridden.
-        &quot;location&quot;: &quot;A String&quot;, # (`CreationOnly`)
-            # The location where this cluster&#x27;s nodes and storage reside. For best
-            # performance, clients should be located as close as possible to this
-            # cluster. Currently only zones are supported, so values should be of the
-            # form `projects/{project}/locations/{zone}`.
-        &quot;state&quot;: &quot;A String&quot;, # (`OutputOnly`)
-            # The current state of the cluster.
-      },
-    ],
     &quot;failedLocations&quot;: [ # Locations from which Cluster information could not be retrieved,
         # due to an outage or some other transient condition.
         # Clusters from these locations may be missing from `clusters`,
@@ -296,6 +267,23 @@
       &quot;A String&quot;,
     ],
     &quot;nextPageToken&quot;: &quot;A String&quot;, # DEPRECATED: This field is unused and ignored.
+    &quot;clusters&quot;: [ # The list of requested clusters.
+      { # A resizable group of nodes in a particular cloud location, capable
+          # of serving all Tables in the parent
+          # Instance.
+        &quot;location&quot;: &quot;A String&quot;, # Immutable. The location where this cluster&#x27;s nodes and storage reside. For best
+            # performance, clients should be located as close as possible to this
+            # cluster. Currently only zones are supported, so values should be of the
+            # form `projects/{project}/locations/{zone}`.
+        &quot;name&quot;: &quot;A String&quot;, # The unique name of the cluster. Values are of the form
+            # `projects/{project}/instances/{instance}/clusters/a-z*`.
+        &quot;defaultStorageType&quot;: &quot;A String&quot;, # Immutable. The type of storage used by this cluster to serve its
+            # parent instance&#x27;s tables, unless explicitly overridden.
+        &quot;serveNodes&quot;: 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
+            # throughput and more consistent performance.
+        &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the cluster.
+      },
+    ],
   }</pre>
 </div>
 
@@ -318,8 +306,7 @@
   <pre>Updates a cluster within an instance.
 
 Args:
-  name: string, Required. (`OutputOnly`)
-The unique name of the cluster. Values are of the form
+  name: string, The unique name of the cluster. Values are of the form
 `projects/{project}/instances/{instance}/clusters/a-z*`. (required)
   body: object, The request body.
     The object takes the form of:
@@ -327,21 +314,17 @@
 { # A resizable group of nodes in a particular cloud location, capable
     # of serving all Tables in the parent
     # Instance.
-  &quot;name&quot;: &quot;A String&quot;, # Required. (`OutputOnly`)
-      # The unique name of the cluster. Values are of the form
-      # `projects/{project}/instances/{instance}/clusters/a-z*`.
-  &quot;serveNodes&quot;: 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
-      # throughput and more consistent performance.
-  &quot;defaultStorageType&quot;: &quot;A String&quot;, # (`CreationOnly`)
-      # The type of storage used by this cluster to serve its
-      # parent instance&#x27;s tables, unless explicitly overridden.
-  &quot;location&quot;: &quot;A String&quot;, # (`CreationOnly`)
-      # The location where this cluster&#x27;s nodes and storage reside. For best
+  &quot;location&quot;: &quot;A String&quot;, # Immutable. The location where this cluster&#x27;s nodes and storage reside. For best
       # performance, clients should be located as close as possible to this
       # cluster. Currently only zones are supported, so values should be of the
       # form `projects/{project}/locations/{zone}`.
-  &quot;state&quot;: &quot;A String&quot;, # (`OutputOnly`)
-      # The current state of the cluster.
+  &quot;name&quot;: &quot;A String&quot;, # The unique name of the cluster. Values are of the form
+      # `projects/{project}/instances/{instance}/clusters/a-z*`.
+  &quot;defaultStorageType&quot;: &quot;A String&quot;, # Immutable. The type of storage used by this cluster to serve its
+      # parent instance&#x27;s tables, unless explicitly overridden.
+  &quot;serveNodes&quot;: 42, # Required. The number of nodes allocated to this cluster. More nodes enable higher
+      # throughput and more consistent performance.
+  &quot;state&quot;: &quot;A String&quot;, # Output only. The current state of the cluster.
 }
 
   x__xgafv: string, V1 error format.
@@ -354,6 +337,30 @@
 
     { # This resource represents a long-running operation that is the result of a
       # network API call.
+    &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;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;response&quot;: { # The normal response of the operation in case of success.  If the original
         # method returns no data on success, such as `Delete`, the response is
         # `google.protobuf.Empty`.  If the original method is standard
@@ -367,30 +374,6 @@
     &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;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;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;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.