chore: regens API reference docs (#889)

diff --git a/docs/dyn/composer_v1.projects.locations.environments.html b/docs/dyn/composer_v1.projects.locations.environments.html
index 724f68e..e7b70b3 100644
--- a/docs/dyn/composer_v1.projects.locations.environments.html
+++ b/docs/dyn/composer_v1.projects.locations.environments.html
@@ -75,7 +75,7 @@
 <h1><a href="composer_v1.html">Cloud Composer API</a> . <a href="composer_v1.projects.html">projects</a> . <a href="composer_v1.projects.locations.html">locations</a> . <a href="composer_v1.projects.locations.environments.html">environments</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(parent, body, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(parent, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Create a new environment.</p>
 <p class="toc_element">
   <code><a href="#delete">delete(name, x__xgafv=None)</a></code></p>
@@ -84,30 +84,28 @@
   <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
 <p class="firstline">Get an existing environment.</p>
 <p class="toc_element">
-  <code><a href="#list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+  <code><a href="#list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</a></code></p>
 <p class="firstline">List environments.</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#patch">patch(name, body, updateMask=None, x__xgafv=None)</a></code></p>
+  <code><a href="#patch">patch(name, body=None, updateMask=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Update an environment.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(parent, body, x__xgafv=None)</code>
+    <code class="details" id="create">create(parent, body=None, x__xgafv=None)</code>
   <pre>Create a new environment.
 
 Args:
   parent: string, The parent must be of the form
 "projects/{projectId}/locations/{locationId}". (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # An environment for running orchestration tasks.
-    "updateTime": "A String", # Output only.
-        # The time at which this environment was last modified.
-    "uuid": "A String", # Output only.
-        # The UUID (Universally Unique IDentifier) associated with this environment.
+    "updateTime": "A String", # Output only. The time at which this environment was last modified.
+    "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment.
         # This value is generated when the environment is created.
     "labels": { # Optional. User-defined labels for this environment.
         # The labels map can contain no more than 64 entries. Entries of the labels
@@ -115,14 +113,13 @@
         # 
         # * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62}
         # * Values must conform to regexp:  [\p{Ll}\p{Lo}\p{N}_-]{0,63}
-        # * Both keys and values are additionally constrained to be <= 128 bytes in
+        # * Both keys and values are additionally constrained to be &lt;= 128 bytes in
         # size.
       "a_key": "A String",
     },
     "state": "A String", # The current state of the environment.
     "config": { # Configuration information for an environment. # Configuration parameters for this environment.
-      "dagGcsPrefix": "A String", # Output only.
-          # The Cloud Storage prefix of the DAGs for this environment. Although Cloud
+      "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud
           # Storage objects reside in a flat namespace, a hierarchical file tree
           # can be simulated using "/"-delimited object name prefixes. DAG objects for
           # this environment reside in a simulated directory with the given prefix.
@@ -141,7 +138,7 @@
             # the server replaces `latest` with the current Cloud Composer version
             # and stores that version number in the same field.
             #
-            # The portion of the image version that follows <em>airflow-</em> is an
+            # The portion of the image version that follows &lt;em&gt;airflow-&lt;/em&gt; is an
             # official Apache Airflow repository
             # [release name](https://github.com/apache/incubator-airflow/releases).
             #
@@ -152,7 +149,7 @@
             #
             # Keys refer to the lowercase package name such as "numpy"
             # and values are the lowercase extras and version specifier such as
-            # "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a
+            # "==1.12.0", "[devel,gcp_api]", or "[devel]&gt;=1.8.2, &lt;1.9.2". To specify a
             # package without pinning it to a version specifier, use the empty string as
             # the value.
           "a_key": "A String",
@@ -204,12 +201,10 @@
           "a_key": "A String",
         },
       },
-      "airflowUri": "A String", # Output only.
-          # The URI of the Apache Airflow Web UI hosted within this environment (see
+      "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see
           # [Airflow web
           # interface](/composer/docs/how-to/accessing/airflow-web-interface)).
-      "gkeCluster": "A String", # Output only.
-          # The Kubernetes Engine cluster used to run this environment.
+      "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
       "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running # The configuration used for the Kubernetes Engine cluster.
           # the Apache Airflow software.
         "machineType": "A String", # Optional. The Compute Engine
@@ -228,6 +223,9 @@
             # specified, the location information from the specified field will be
             # propagated to the unspecified field.
             #
+            # The `machineTypeId` must not be a [shared-core machine
+            # type](/compute/docs/machine-types#sharedcore).
+            #
             # If this field is unspecified, the `machineTypeId` defaults
             # to "n1-standard-1".
         "network": "A String", # Optional. The Compute Engine network to be used for machine
@@ -280,14 +278,84 @@
             # If a subnetwork is provided, `nodeConfig.network` must also be provided,
             # and the subnetwork must belong to the enclosing environment's project and
             # location.
+        "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
+            # GKE cluster running the Apache Airflow software.
+          "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in
+              # the GKE cluster.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+              #
+              # Set to blank to have GKE choose a range with the default size.
+              #
+              # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+              # netmask.
+              #
+              # Set to a
+              # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+              # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+              # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+              # to use.
+          "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this
+              # GKE cluster.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+              #
+              # Set to blank to have GKE choose a range with the default size.
+              #
+              # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+              # netmask.
+              #
+              # Set to a
+              # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+              # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+              # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+              # to use.
+          "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate
+              # IP addresses to the GKE cluster.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+          "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster.
+              # If `true`, a VPC-native cluster is created.
+          "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate
+              # IP addresses to pods.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+        },
       },
       "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be
           # used to run this environment.
+      "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer # The configuration used for the Private IP Cloud Composer environment.
+          # environment.
+        "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for
+            # Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
+        "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs
+            # to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and
+            # `cloud_sql_ipv4_cidr_block`.
+        "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs.
+        "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created.
+            # If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be
+            # set to true.
+        "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer # Optional. Configuration for the private GKE cluster for a Private IP
+            # Cloud Composer environment.
+            # environment.
+          "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is
+              # denied.
+          "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This
+              # range is used for assigning internal IP addresses to the GKE cluster
+              # master or set of masters and to the internal load balancer virtual IP.
+              # This range must not overlap with any other ranges in use
+              # within the cluster's network.
+          "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If
+              # left blank, the default value of '172.16.0.0/23' is used.
+        },
+      },
     },
-    "createTime": "A String", # Output only.
-        # The time at which this environment was created.
+    "createTime": "A String", # Output only. The time at which this environment was created.
     "name": "A String", # The resource name of the environment, in the form:
         # "projects/{projectId}/locations/{locationId}/environments/{environmentId}"
+        # 
+        # EnvironmentId must start with a lowercase letter followed by up to 63
+        # lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
   }
 
   x__xgafv: string, V1 error format.
@@ -308,56 +376,11 @@
     },
     "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). The error model is designed to be:
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
         #
-        # - Simple to use and understand for most users
-        # - Flexible enough to meet unexpected needs
-        #
-        # # Overview
-        #
-        # The `Status` message contains three pieces of data: error code, error
-        # message, and error details. The error code should be an enum value of
-        # google.rpc.Code, but it may accept additional error codes if needed.  The
-        # error message should be a developer-facing English message that helps
-        # developers *understand* and *resolve* the error. If a localized user-facing
-        # error message is needed, put the localized message in the error details or
-        # localize it in the client. The optional error details may contain arbitrary
-        # information about the error. There is a predefined set of error detail types
-        # in the package `google.rpc` that can be used for common error conditions.
-        #
-        # # Language mapping
-        #
-        # The `Status` message is the logical representation of the error model, but it
-        # is not necessarily the actual wire format. When the `Status` message is
-        # exposed in different client libraries and different wire protocols, it can be
-        # mapped differently. For example, it will likely be mapped to some exceptions
-        # in Java, but more likely mapped to some error codes in C.
-        #
-        # # Other uses
-        #
-        # The error model and the `Status` message can be used in a variety of
-        # environments, either with or without APIs, to provide a
-        # consistent developer experience across different environments.
-        #
-        # Example uses of this error model include:
-        #
-        # - Partial errors. If a service needs to return partial errors to the client,
-        #     it may embed the `Status` in the normal response to indicate the partial
-        #     errors.
-        #
-        # - Workflow errors. A typical workflow has multiple steps. Each step may
-        #     have a `Status` message for error reporting.
-        #
-        # - Batch operations. If a client uses batch request and batch response, the
-        #     `Status` message should be used directly inside batch response, one for
-        #     each error sub-response.
-        #
-        # - Asynchronous operations. If an API call embeds asynchronous operation
-        #     results in its response, the status of those operations should be
-        #     represented directly using the `Status` message.
-        #
-        # - Logging. If some API errors are stored in logs, the message `Status` could
-        #     be used directly after any stripping needed for security/privacy reasons.
+        # 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.
@@ -413,56 +436,11 @@
     },
     "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). The error model is designed to be:
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
         #
-        # - Simple to use and understand for most users
-        # - Flexible enough to meet unexpected needs
-        #
-        # # Overview
-        #
-        # The `Status` message contains three pieces of data: error code, error
-        # message, and error details. The error code should be an enum value of
-        # google.rpc.Code, but it may accept additional error codes if needed.  The
-        # error message should be a developer-facing English message that helps
-        # developers *understand* and *resolve* the error. If a localized user-facing
-        # error message is needed, put the localized message in the error details or
-        # localize it in the client. The optional error details may contain arbitrary
-        # information about the error. There is a predefined set of error detail types
-        # in the package `google.rpc` that can be used for common error conditions.
-        #
-        # # Language mapping
-        #
-        # The `Status` message is the logical representation of the error model, but it
-        # is not necessarily the actual wire format. When the `Status` message is
-        # exposed in different client libraries and different wire protocols, it can be
-        # mapped differently. For example, it will likely be mapped to some exceptions
-        # in Java, but more likely mapped to some error codes in C.
-        #
-        # # Other uses
-        #
-        # The error model and the `Status` message can be used in a variety of
-        # environments, either with or without APIs, to provide a
-        # consistent developer experience across different environments.
-        #
-        # Example uses of this error model include:
-        #
-        # - Partial errors. If a service needs to return partial errors to the client,
-        #     it may embed the `Status` in the normal response to indicate the partial
-        #     errors.
-        #
-        # - Workflow errors. A typical workflow has multiple steps. Each step may
-        #     have a `Status` message for error reporting.
-        #
-        # - Batch operations. If a client uses batch request and batch response, the
-        #     `Status` message should be used directly inside batch response, one for
-        #     each error sub-response.
-        #
-        # - Asynchronous operations. If an API call embeds asynchronous operation
-        #     results in its response, the status of those operations should be
-        #     represented directly using the `Status` message.
-        #
-        # - Logging. If some API errors are stored in logs, the message `Status` could
-        #     be used directly after any stripping needed for security/privacy reasons.
+        # 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.
@@ -509,10 +487,8 @@
   An object of the form:
 
     { # An environment for running orchestration tasks.
-      "updateTime": "A String", # Output only.
-          # The time at which this environment was last modified.
-      "uuid": "A String", # Output only.
-          # The UUID (Universally Unique IDentifier) associated with this environment.
+      "updateTime": "A String", # Output only. The time at which this environment was last modified.
+      "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment.
           # This value is generated when the environment is created.
       "labels": { # Optional. User-defined labels for this environment.
           # The labels map can contain no more than 64 entries. Entries of the labels
@@ -520,14 +496,13 @@
           #
           # * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62}
           # * Values must conform to regexp:  [\p{Ll}\p{Lo}\p{N}_-]{0,63}
-          # * Both keys and values are additionally constrained to be <= 128 bytes in
+          # * Both keys and values are additionally constrained to be &lt;= 128 bytes in
           # size.
         "a_key": "A String",
       },
       "state": "A String", # The current state of the environment.
       "config": { # Configuration information for an environment. # Configuration parameters for this environment.
-        "dagGcsPrefix": "A String", # Output only.
-            # The Cloud Storage prefix of the DAGs for this environment. Although Cloud
+        "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud
             # Storage objects reside in a flat namespace, a hierarchical file tree
             # can be simulated using "/"-delimited object name prefixes. DAG objects for
             # this environment reside in a simulated directory with the given prefix.
@@ -546,7 +521,7 @@
               # the server replaces `latest` with the current Cloud Composer version
               # and stores that version number in the same field.
               #
-              # The portion of the image version that follows <em>airflow-</em> is an
+              # The portion of the image version that follows &lt;em&gt;airflow-&lt;/em&gt; is an
               # official Apache Airflow repository
               # [release name](https://github.com/apache/incubator-airflow/releases).
               #
@@ -557,7 +532,7 @@
               #
               # Keys refer to the lowercase package name such as "numpy"
               # and values are the lowercase extras and version specifier such as
-              # "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a
+              # "==1.12.0", "[devel,gcp_api]", or "[devel]&gt;=1.8.2, &lt;1.9.2". To specify a
               # package without pinning it to a version specifier, use the empty string as
               # the value.
             "a_key": "A String",
@@ -609,12 +584,10 @@
             "a_key": "A String",
           },
         },
-        "airflowUri": "A String", # Output only.
-            # The URI of the Apache Airflow Web UI hosted within this environment (see
+        "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see
             # [Airflow web
             # interface](/composer/docs/how-to/accessing/airflow-web-interface)).
-        "gkeCluster": "A String", # Output only.
-            # The Kubernetes Engine cluster used to run this environment.
+        "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
         "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running # The configuration used for the Kubernetes Engine cluster.
             # the Apache Airflow software.
           "machineType": "A String", # Optional. The Compute Engine
@@ -633,6 +606,9 @@
               # specified, the location information from the specified field will be
               # propagated to the unspecified field.
               #
+              # The `machineTypeId` must not be a [shared-core machine
+              # type](/compute/docs/machine-types#sharedcore).
+              #
               # If this field is unspecified, the `machineTypeId` defaults
               # to "n1-standard-1".
           "network": "A String", # Optional. The Compute Engine network to be used for machine
@@ -685,30 +661,100 @@
               # If a subnetwork is provided, `nodeConfig.network` must also be provided,
               # and the subnetwork must belong to the enclosing environment's project and
               # location.
+          "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
+              # GKE cluster running the Apache Airflow software.
+            "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in
+                # the GKE cluster.
+                #
+                # This field is applicable only when `use_ip_aliases` is true.
+                #
+                # Set to blank to have GKE choose a range with the default size.
+                #
+                # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+                # netmask.
+                #
+                # Set to a
+                # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+                # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+                # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+                # to use.
+            "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this
+                # GKE cluster.
+                #
+                # This field is applicable only when `use_ip_aliases` is true.
+                #
+                # Set to blank to have GKE choose a range with the default size.
+                #
+                # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+                # netmask.
+                #
+                # Set to a
+                # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+                # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+                # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+                # to use.
+            "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate
+                # IP addresses to the GKE cluster.
+                #
+                # This field is applicable only when `use_ip_aliases` is true.
+            "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster.
+                # If `true`, a VPC-native cluster is created.
+            "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate
+                # IP addresses to pods.
+                #
+                # This field is applicable only when `use_ip_aliases` is true.
+          },
         },
         "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be
             # used to run this environment.
+        "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer # The configuration used for the Private IP Cloud Composer environment.
+            # environment.
+          "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for
+              # Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
+          "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs
+              # to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and
+              # `cloud_sql_ipv4_cidr_block`.
+          "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs.
+          "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created.
+              # If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be
+              # set to true.
+          "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer # Optional. Configuration for the private GKE cluster for a Private IP
+              # Cloud Composer environment.
+              # environment.
+            "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is
+                # denied.
+            "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This
+                # range is used for assigning internal IP addresses to the GKE cluster
+                # master or set of masters and to the internal load balancer virtual IP.
+                # This range must not overlap with any other ranges in use
+                # within the cluster's network.
+            "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If
+                # left blank, the default value of '172.16.0.0/23' is used.
+          },
+        },
       },
-      "createTime": "A String", # Output only.
-          # The time at which this environment was created.
+      "createTime": "A String", # Output only. The time at which this environment was created.
       "name": "A String", # The resource name of the environment, in the form:
           # "projects/{projectId}/locations/{locationId}/environments/{environmentId}"
+          #
+          # EnvironmentId must start with a lowercase letter followed by up to 63
+          # lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
     }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</code>
+    <code class="details" id="list">list(parent, pageToken=None, x__xgafv=None, pageSize=None)</code>
   <pre>List environments.
 
 Args:
   parent: string, List environments in the given project and location, in the form:
 "projects/{projectId}/locations/{locationId}" (required)
-  pageSize: integer, The maximum number of environments to return.
   pageToken: string, The next_page_token value returned from a previous List request, if any.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
       2 - v2 error format
+  pageSize: integer, The maximum number of environments to return.
 
 Returns:
   An object of the form:
@@ -717,10 +763,8 @@
     "nextPageToken": "A String", # The page token used to query for the next page if one exists.
     "environments": [ # The list of environments returned by a ListEnvironmentsRequest.
       { # An environment for running orchestration tasks.
-          "updateTime": "A String", # Output only.
-              # The time at which this environment was last modified.
-          "uuid": "A String", # Output only.
-              # The UUID (Universally Unique IDentifier) associated with this environment.
+          "updateTime": "A String", # Output only. The time at which this environment was last modified.
+          "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment.
               # This value is generated when the environment is created.
           "labels": { # Optional. User-defined labels for this environment.
               # The labels map can contain no more than 64 entries. Entries of the labels
@@ -728,14 +772,13 @@
               #
               # * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62}
               # * Values must conform to regexp:  [\p{Ll}\p{Lo}\p{N}_-]{0,63}
-              # * Both keys and values are additionally constrained to be <= 128 bytes in
+              # * Both keys and values are additionally constrained to be &lt;= 128 bytes in
               # size.
             "a_key": "A String",
           },
           "state": "A String", # The current state of the environment.
           "config": { # Configuration information for an environment. # Configuration parameters for this environment.
-            "dagGcsPrefix": "A String", # Output only.
-                # The Cloud Storage prefix of the DAGs for this environment. Although Cloud
+            "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud
                 # Storage objects reside in a flat namespace, a hierarchical file tree
                 # can be simulated using "/"-delimited object name prefixes. DAG objects for
                 # this environment reside in a simulated directory with the given prefix.
@@ -754,7 +797,7 @@
                   # the server replaces `latest` with the current Cloud Composer version
                   # and stores that version number in the same field.
                   #
-                  # The portion of the image version that follows <em>airflow-</em> is an
+                  # The portion of the image version that follows &lt;em&gt;airflow-&lt;/em&gt; is an
                   # official Apache Airflow repository
                   # [release name](https://github.com/apache/incubator-airflow/releases).
                   #
@@ -765,7 +808,7 @@
                   #
                   # Keys refer to the lowercase package name such as "numpy"
                   # and values are the lowercase extras and version specifier such as
-                  # "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a
+                  # "==1.12.0", "[devel,gcp_api]", or "[devel]&gt;=1.8.2, &lt;1.9.2". To specify a
                   # package without pinning it to a version specifier, use the empty string as
                   # the value.
                 "a_key": "A String",
@@ -817,12 +860,10 @@
                 "a_key": "A String",
               },
             },
-            "airflowUri": "A String", # Output only.
-                # The URI of the Apache Airflow Web UI hosted within this environment (see
+            "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see
                 # [Airflow web
                 # interface](/composer/docs/how-to/accessing/airflow-web-interface)).
-            "gkeCluster": "A String", # Output only.
-                # The Kubernetes Engine cluster used to run this environment.
+            "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
             "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running # The configuration used for the Kubernetes Engine cluster.
                 # the Apache Airflow software.
               "machineType": "A String", # Optional. The Compute Engine
@@ -841,6 +882,9 @@
                   # specified, the location information from the specified field will be
                   # propagated to the unspecified field.
                   #
+                  # The `machineTypeId` must not be a [shared-core machine
+                  # type](/compute/docs/machine-types#sharedcore).
+                  #
                   # If this field is unspecified, the `machineTypeId` defaults
                   # to "n1-standard-1".
               "network": "A String", # Optional. The Compute Engine network to be used for machine
@@ -893,14 +937,84 @@
                   # If a subnetwork is provided, `nodeConfig.network` must also be provided,
                   # and the subnetwork must belong to the enclosing environment's project and
                   # location.
+              "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
+                  # GKE cluster running the Apache Airflow software.
+                "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in
+                    # the GKE cluster.
+                    #
+                    # This field is applicable only when `use_ip_aliases` is true.
+                    #
+                    # Set to blank to have GKE choose a range with the default size.
+                    #
+                    # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+                    # netmask.
+                    #
+                    # Set to a
+                    # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+                    # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+                    # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+                    # to use.
+                "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this
+                    # GKE cluster.
+                    #
+                    # This field is applicable only when `use_ip_aliases` is true.
+                    #
+                    # Set to blank to have GKE choose a range with the default size.
+                    #
+                    # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+                    # netmask.
+                    #
+                    # Set to a
+                    # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+                    # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+                    # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+                    # to use.
+                "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate
+                    # IP addresses to the GKE cluster.
+                    #
+                    # This field is applicable only when `use_ip_aliases` is true.
+                "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster.
+                    # If `true`, a VPC-native cluster is created.
+                "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate
+                    # IP addresses to pods.
+                    #
+                    # This field is applicable only when `use_ip_aliases` is true.
+              },
             },
             "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be
                 # used to run this environment.
+            "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer # The configuration used for the Private IP Cloud Composer environment.
+                # environment.
+              "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for
+                  # Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
+              "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs
+                  # to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and
+                  # `cloud_sql_ipv4_cidr_block`.
+              "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs.
+              "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created.
+                  # If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be
+                  # set to true.
+              "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer # Optional. Configuration for the private GKE cluster for a Private IP
+                  # Cloud Composer environment.
+                  # environment.
+                "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is
+                    # denied.
+                "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This
+                    # range is used for assigning internal IP addresses to the GKE cluster
+                    # master or set of masters and to the internal load balancer virtual IP.
+                    # This range must not overlap with any other ranges in use
+                    # within the cluster's network.
+                "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If
+                    # left blank, the default value of '172.16.0.0/23' is used.
+              },
+            },
           },
-          "createTime": "A String", # Output only.
-              # The time at which this environment was created.
+          "createTime": "A String", # Output only. The time at which this environment was created.
           "name": "A String", # The resource name of the environment, in the form:
               # "projects/{projectId}/locations/{locationId}/environments/{environmentId}"
+              #
+              # EnvironmentId must start with a lowercase letter followed by up to 63
+              # lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
         },
     ],
   }</pre>
@@ -921,20 +1035,18 @@
 </div>
 
 <div class="method">
-    <code class="details" id="patch">patch(name, body, updateMask=None, x__xgafv=None)</code>
+    <code class="details" id="patch">patch(name, body=None, updateMask=None, x__xgafv=None)</code>
   <pre>Update an environment.
 
 Args:
   name: string, The relative resource name of the environment to update, in the form:
 "projects/{projectId}/locations/{locationId}/environments/{environmentId}" (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # An environment for running orchestration tasks.
-    "updateTime": "A String", # Output only.
-        # The time at which this environment was last modified.
-    "uuid": "A String", # Output only.
-        # The UUID (Universally Unique IDentifier) associated with this environment.
+    "updateTime": "A String", # Output only. The time at which this environment was last modified.
+    "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment.
         # This value is generated when the environment is created.
     "labels": { # Optional. User-defined labels for this environment.
         # The labels map can contain no more than 64 entries. Entries of the labels
@@ -942,14 +1054,13 @@
         # 
         # * Keys must conform to regexp: \p{Ll}\p{Lo}{0,62}
         # * Values must conform to regexp:  [\p{Ll}\p{Lo}\p{N}_-]{0,63}
-        # * Both keys and values are additionally constrained to be <= 128 bytes in
+        # * Both keys and values are additionally constrained to be &lt;= 128 bytes in
         # size.
       "a_key": "A String",
     },
     "state": "A String", # The current state of the environment.
     "config": { # Configuration information for an environment. # Configuration parameters for this environment.
-      "dagGcsPrefix": "A String", # Output only.
-          # The Cloud Storage prefix of the DAGs for this environment. Although Cloud
+      "dagGcsPrefix": "A String", # Output only. The Cloud Storage prefix of the DAGs for this environment. Although Cloud
           # Storage objects reside in a flat namespace, a hierarchical file tree
           # can be simulated using "/"-delimited object name prefixes. DAG objects for
           # this environment reside in a simulated directory with the given prefix.
@@ -968,7 +1079,7 @@
             # the server replaces `latest` with the current Cloud Composer version
             # and stores that version number in the same field.
             #
-            # The portion of the image version that follows <em>airflow-</em> is an
+            # The portion of the image version that follows &lt;em&gt;airflow-&lt;/em&gt; is an
             # official Apache Airflow repository
             # [release name](https://github.com/apache/incubator-airflow/releases).
             #
@@ -979,7 +1090,7 @@
             #
             # Keys refer to the lowercase package name such as "numpy"
             # and values are the lowercase extras and version specifier such as
-            # "==1.12.0", "[devel,gcp_api]", or "[devel]>=1.8.2, <1.9.2". To specify a
+            # "==1.12.0", "[devel,gcp_api]", or "[devel]&gt;=1.8.2, &lt;1.9.2". To specify a
             # package without pinning it to a version specifier, use the empty string as
             # the value.
           "a_key": "A String",
@@ -1031,12 +1142,10 @@
           "a_key": "A String",
         },
       },
-      "airflowUri": "A String", # Output only.
-          # The URI of the Apache Airflow Web UI hosted within this environment (see
+      "airflowUri": "A String", # Output only. The URI of the Apache Airflow Web UI hosted within this environment (see
           # [Airflow web
           # interface](/composer/docs/how-to/accessing/airflow-web-interface)).
-      "gkeCluster": "A String", # Output only.
-          # The Kubernetes Engine cluster used to run this environment.
+      "gkeCluster": "A String", # Output only. The Kubernetes Engine cluster used to run this environment.
       "nodeConfig": { # The configuration information for the Kubernetes Engine nodes running # The configuration used for the Kubernetes Engine cluster.
           # the Apache Airflow software.
         "machineType": "A String", # Optional. The Compute Engine
@@ -1055,6 +1164,9 @@
             # specified, the location information from the specified field will be
             # propagated to the unspecified field.
             #
+            # The `machineTypeId` must not be a [shared-core machine
+            # type](/compute/docs/machine-types#sharedcore).
+            #
             # If this field is unspecified, the `machineTypeId` defaults
             # to "n1-standard-1".
         "network": "A String", # Optional. The Compute Engine network to be used for machine
@@ -1107,14 +1219,84 @@
             # If a subnetwork is provided, `nodeConfig.network` must also be provided,
             # and the subnetwork must belong to the enclosing environment's project and
             # location.
+        "ipAllocationPolicy": { # Configuration for controlling how IPs are allocated in the # Optional. The configuration for controlling how IPs are allocated in the GKE cluster.
+            # GKE cluster running the Apache Airflow software.
+          "clusterIpv4CidrBlock": "A String", # Optional. The IP address range used to allocate IP addresses to pods in
+              # the GKE cluster.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+              #
+              # Set to blank to have GKE choose a range with the default size.
+              #
+              # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+              # netmask.
+              #
+              # Set to a
+              # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+              # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+              # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+              # to use.
+          "servicesIpv4CidrBlock": "A String", # Optional. The IP address range of the services IP addresses in this
+              # GKE cluster.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+              #
+              # Set to blank to have GKE choose a range with the default size.
+              #
+              # Set to /netmask (e.g. `/14`) to have GKE choose a range with a specific
+              # netmask.
+              #
+              # Set to a
+              # [CIDR](http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing)
+              # notation (e.g. `10.96.0.0/14`) from the RFC-1918 private networks (e.g.
+              # `10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`) to pick a specific range
+              # to use.
+          "servicesSecondaryRangeName": "A String", # Optional. The name of the services' secondary range used to allocate
+              # IP addresses to the GKE cluster.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+          "useIpAliases": True or False, # Optional. Whether or not to enable Alias IPs in the GKE cluster.
+              # If `true`, a VPC-native cluster is created.
+          "clusterSecondaryRangeName": "A String", # Optional. The name of the GKE cluster's secondary range used to allocate
+              # IP addresses to pods.
+              #
+              # This field is applicable only when `use_ip_aliases` is true.
+        },
       },
       "nodeCount": 42, # The number of nodes in the Kubernetes Engine cluster that will be
           # used to run this environment.
+      "privateEnvironmentConfig": { # The configuration information for configuring a Private IP Cloud Composer # The configuration used for the Private IP Cloud Composer environment.
+          # environment.
+        "cloudSqlIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range in tenant project will be reserved for
+            # Cloud SQL. Needs to be disjoint from `web_server_ipv4_cidr_block`.
+        "webServerIpv4CidrBlock": "A String", # Optional. The CIDR block from which IP range for web server will be reserved. Needs
+            # to be disjoint from `private_cluster_config.master_ipv4_cidr_block` and
+            # `cloud_sql_ipv4_cidr_block`.
+        "webServerIpv4ReservedRange": "A String", # Output only. The IP range reserved for the tenant project's App Engine VMs.
+        "enablePrivateEnvironment": True or False, # Optional. If `true`, a Private IP Cloud Composer environment is created.
+            # If this field is set to true, `IPAllocationPolicy.use_ip_aliases` must be
+            # set to true.
+        "privateClusterConfig": { # Configuration options for the private GKE cluster in a Cloud Composer # Optional. Configuration for the private GKE cluster for a Private IP
+            # Cloud Composer environment.
+            # environment.
+          "enablePrivateEndpoint": True or False, # Optional. If `true`, access to the public endpoint of the GKE cluster is
+              # denied.
+          "masterIpv4ReservedRange": "A String", # Output only. The IP range in CIDR notation to use for the hosted master network. This
+              # range is used for assigning internal IP addresses to the GKE cluster
+              # master or set of masters and to the internal load balancer virtual IP.
+              # This range must not overlap with any other ranges in use
+              # within the cluster's network.
+          "masterIpv4CidrBlock": "A String", # Optional. The CIDR block from which IPv4 range for GKE master will be reserved. If
+              # left blank, the default value of '172.16.0.0/23' is used.
+        },
+      },
     },
-    "createTime": "A String", # Output only.
-        # The time at which this environment was created.
+    "createTime": "A String", # Output only. The time at which this environment was created.
     "name": "A String", # The resource name of the environment, in the form:
         # "projects/{projectId}/locations/{locationId}/environments/{environmentId}"
+        # 
+        # EnvironmentId must start with a lowercase letter followed by up to 63
+        # lowercase letters, numbers, or hyphens, and cannot end with a hyphen.
   }
 
   updateMask: string, Required. A comma-separated list of paths, relative to `Environment`, of
@@ -1178,78 +1360,78 @@
 
 **Note:** Only the following fields can be updated:
 
- <table>
- <tbody>
- <tr>
- <td><strong>Mask</strong></td>
- <td><strong>Purpose</strong></td>
- </tr>
- <tr>
- <td>config.softwareConfig.pypiPackages
- </td>
- <td>Replace all custom custom PyPI packages. If a replacement
+ &lt;table&gt;
+ &lt;tbody&gt;
+ &lt;tr&gt;
+ &lt;td&gt;&lt;strong&gt;Mask&lt;/strong&gt;&lt;/td&gt;
+ &lt;td&gt;&lt;strong&gt;Purpose&lt;/strong&gt;&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;config.softwareConfig.pypiPackages
+ &lt;/td&gt;
+ &lt;td&gt;Replace all custom custom PyPI packages. If a replacement
  package map is not included in `environment`, all custom
  PyPI packages are cleared. It is an error to provide both this mask and a
- mask specifying an individual package.</td>
- </tr>
- <tr>
- <td>config.softwareConfig.pypiPackages.<var>packagename</var></td>
- <td>Update the custom PyPI package <var>packagename</var>,
+ mask specifying an individual package.&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;config.softwareConfig.pypiPackages.&lt;var&gt;packagename&lt;/var&gt;&lt;/td&gt;
+ &lt;td&gt;Update the custom PyPI package &lt;var&gt;packagename&lt;/var&gt;,
  preserving other packages. To delete the package, include it in
  `updateMask`, and omit the mapping for it in
  `environment.config.softwareConfig.pypiPackages`. It is an error
  to provide both a mask of this form and the
- "config.softwareConfig.pypiPackages" mask.</td>
- </tr>
- <tr>
- <td>labels</td>
- <td>Replace all environment labels. If a replacement labels map is not
+ "config.softwareConfig.pypiPackages" mask.&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;labels&lt;/td&gt;
+ &lt;td&gt;Replace all environment labels. If a replacement labels map is not
  included in `environment`, all labels are cleared. It is an error to
  provide both this mask and a mask specifying one or more individual
- labels.</td>
- </tr>
- <tr>
- <td>labels.<var>labelName</var></td>
- <td>Set the label named <var>labelName</var>, while preserving other
+ labels.&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;labels.&lt;var&gt;labelName&lt;/var&gt;&lt;/td&gt;
+ &lt;td&gt;Set the label named &lt;var&gt;labelName&lt;/var&gt;, while preserving other
  labels. To delete the label, include it in `updateMask` and omit its
  mapping in `environment.labels`. It is an error to provide both a
- mask of this form and the "labels" mask.</td>
- </tr>
- <tr>
- <td>config.nodeCount</td>
- <td>Horizontally scale the number of nodes in the environment. An integer
+ mask of this form and the "labels" mask.&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;config.nodeCount&lt;/td&gt;
+ &lt;td&gt;Horizontally scale the number of nodes in the environment. An integer
  greater than or equal to 3 must be provided in the `config.nodeCount`
  field.
- </td>
- </tr>
- <tr>
- <td>config.softwareConfig.airflowConfigOverrides</td>
- <td>Replace all Apache Airflow config overrides. If a replacement config
+ &lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;config.softwareConfig.airflowConfigOverrides&lt;/td&gt;
+ &lt;td&gt;Replace all Apache Airflow config overrides. If a replacement config
  overrides map is not included in `environment`, all config overrides
  are cleared.
  It is an error to provide both this mask and a mask specifying one or
- more individual config overrides.</td>
- </tr>
- <tr>
- <td>config.softwareConfig.airflowConfigOverrides.<var>section</var>-<var>name
- </var></td>
- <td>Override the Apache Airflow config property <var>name</var> in the
- section named <var>section</var>, preserving other properties. To delete
+ more individual config overrides.&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;config.softwareConfig.airflowConfigOverrides.&lt;var&gt;section&lt;/var&gt;-&lt;var&gt;name
+ &lt;/var&gt;&lt;/td&gt;
+ &lt;td&gt;Override the Apache Airflow config property &lt;var&gt;name&lt;/var&gt; in the
+ section named &lt;var&gt;section&lt;/var&gt;, preserving other properties. To delete
  the property override, include it in `updateMask` and omit its mapping
  in `environment.config.softwareConfig.airflowConfigOverrides`.
  It is an error to provide both a mask of this form and the
- "config.softwareConfig.airflowConfigOverrides" mask.</td>
- </tr>
- <tr>
- <td>config.softwareConfig.envVariables</td>
- <td>Replace all environment variables. If a replacement environment
+ "config.softwareConfig.airflowConfigOverrides" mask.&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;tr&gt;
+ &lt;td&gt;config.softwareConfig.envVariables&lt;/td&gt;
+ &lt;td&gt;Replace all environment variables. If a replacement environment
  variable map is not included in `environment`, all custom environment
  variables  are cleared.
  It is an error to provide both this mask and a mask specifying one or
- more individual environment variables.</td>
- </tr>
- </tbody>
- </table>
+ more individual environment variables.&lt;/td&gt;
+ &lt;/tr&gt;
+ &lt;/tbody&gt;
+ &lt;/table&gt;
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -1268,56 +1450,11 @@
     },
     "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). The error model is designed to be:
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
         #
-        # - Simple to use and understand for most users
-        # - Flexible enough to meet unexpected needs
-        #
-        # # Overview
-        #
-        # The `Status` message contains three pieces of data: error code, error
-        # message, and error details. The error code should be an enum value of
-        # google.rpc.Code, but it may accept additional error codes if needed.  The
-        # error message should be a developer-facing English message that helps
-        # developers *understand* and *resolve* the error. If a localized user-facing
-        # error message is needed, put the localized message in the error details or
-        # localize it in the client. The optional error details may contain arbitrary
-        # information about the error. There is a predefined set of error detail types
-        # in the package `google.rpc` that can be used for common error conditions.
-        #
-        # # Language mapping
-        #
-        # The `Status` message is the logical representation of the error model, but it
-        # is not necessarily the actual wire format. When the `Status` message is
-        # exposed in different client libraries and different wire protocols, it can be
-        # mapped differently. For example, it will likely be mapped to some exceptions
-        # in Java, but more likely mapped to some error codes in C.
-        #
-        # # Other uses
-        #
-        # The error model and the `Status` message can be used in a variety of
-        # environments, either with or without APIs, to provide a
-        # consistent developer experience across different environments.
-        #
-        # Example uses of this error model include:
-        #
-        # - Partial errors. If a service needs to return partial errors to the client,
-        #     it may embed the `Status` in the normal response to indicate the partial
-        #     errors.
-        #
-        # - Workflow errors. A typical workflow has multiple steps. Each step may
-        #     have a `Status` message for error reporting.
-        #
-        # - Batch operations. If a client uses batch request and batch response, the
-        #     `Status` message should be used directly inside batch response, one for
-        #     each error sub-response.
-        #
-        # - Asynchronous operations. If an API call embeds asynchronous operation
-        #     results in its response, the status of those operations should be
-        #     represented directly using the `Status` message.
-        #
-        # - Logging. If some API errors are stored in logs, the message `Status` could
-        #     be used directly after any stripping needed for security/privacy reasons.
+        # 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.