chore: regens API reference docs (#889)

diff --git a/docs/dyn/bigtableadmin_v2.projects.instances.tables.html b/docs/dyn/bigtableadmin_v2.projects.instances.tables.html
index b4d2661..3d25c3a 100644
--- a/docs/dyn/bigtableadmin_v2.projects.instances.tables.html
+++ b/docs/dyn/bigtableadmin_v2.projects.instances.tables.html
@@ -75,16 +75,16 @@
 <h1><a href="bigtableadmin_v2.html">Cloud Bigtable Admin API</a> . <a href="bigtableadmin_v2.projects.html">projects</a> . <a href="bigtableadmin_v2.projects.instances.html">instances</a> . <a href="bigtableadmin_v2.projects.instances.tables.html">tables</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#checkConsistency">checkConsistency(name, body, x__xgafv=None)</a></code></p>
+  <code><a href="#checkConsistency">checkConsistency(name, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Checks replication consistency based on a consistency token, that is, if</p>
 <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">Creates a new table in the specified instance.</p>
 <p class="toc_element">
   <code><a href="#delete">delete(name, x__xgafv=None)</a></code></p>
 <p class="firstline">Permanently deletes a specified table and all of its data.</p>
 <p class="toc_element">
-  <code><a href="#dropRowRange">dropRowRange(name, body, x__xgafv=None)</a></code></p>
+  <code><a href="#dropRowRange">dropRowRange(name, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Permanently drop/delete a row range from a specified table. The request can</p>
 <p class="toc_element">
   <code><a href="#generateConsistencyToken">generateConsistencyToken(name, body=None, x__xgafv=None)</a></code></p>
@@ -94,7 +94,7 @@
 <p class="firstline">Gets metadata information about the specified table.</p>
 <p class="toc_element">
   <code><a href="#getIamPolicy">getIamPolicy(resource, body=None, x__xgafv=None)</a></code></p>
-<p class="firstline">Gets the access control policy for an instance resource. Returns an empty</p>
+<p class="firstline">Gets the access control policy for a Table or Backup resource.</p>
 <p class="toc_element">
   <code><a href="#list">list(parent, pageToken=None, x__xgafv=None, pageSize=None, view=None)</a></code></p>
 <p class="firstline">Lists all tables served from a specified instance.</p>
@@ -102,31 +102,31 @@
   <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="#modifyColumnFamilies">modifyColumnFamilies(name, body, x__xgafv=None)</a></code></p>
+  <code><a href="#modifyColumnFamilies">modifyColumnFamilies(name, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Performs a series of column family modifications on the specified table.</p>
 <p class="toc_element">
-  <code><a href="#setIamPolicy">setIamPolicy(resource, body, x__xgafv=None)</a></code></p>
-<p class="firstline">Sets the access control policy on a table resource. Replaces any existing</p>
+  <code><a href="#setIamPolicy">setIamPolicy(resource, body=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Sets the access control policy on a Table or Backup resource.</p>
 <p class="toc_element">
-  <code><a href="#testIamPermissions">testIamPermissions(resource, body, x__xgafv=None)</a></code></p>
+  <code><a href="#testIamPermissions">testIamPermissions(resource, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Returns permissions that the caller has on the specified table resource.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="checkConsistency">checkConsistency(name, body, x__xgafv=None)</code>
+    <code class="details" id="checkConsistency">checkConsistency(name, body=None, x__xgafv=None)</code>
   <pre>Checks replication consistency based on a consistency token, that is, if
 replication has caught up based on the conditions specified in the token
 and the check request.
 
 Args:
-  name: string, The unique name of the Table for which to check replication consistency.
+  name: string, Required. The unique name of the Table for which to check replication consistency.
 Values are of the form
-`projects/<project>/instances/<instance>/tables/<table>`. (required)
-  body: object, The request body. (required)
+`projects/{project}/instances/{instance}/tables/{table}`. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request message for
       # google.bigtable.admin.v2.BigtableTableAdmin.CheckConsistency
-    "consistencyToken": "A String", # The token created using GenerateConsistencyToken for the Table.
+    "consistencyToken": "A String", # Required. The token created using GenerateConsistencyToken for the Table.
   }
 
   x__xgafv: string, V1 error format.
@@ -145,30 +145,28 @@
 </div>
 
 <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>Creates a new table in the specified instance.
 The table can be created with a full set of initial column families,
 specified in the request.
 
 Args:
-  parent: string, The unique name of the instance in which to create the table.
-Values are of the form `projects/<project>/instances/<instance>`. (required)
-  body: object, The request body. (required)
+  parent: string, Required. The unique name of the instance in which to create the table.
+Values are of the form `projects/{project}/instances/{instance}`. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request message for
       # google.bigtable.admin.v2.BigtableTableAdmin.CreateTable
-    "table": { # A collection of user data indexed by row, column, and timestamp. # The Table to create.
+    "table": { # A collection of user data indexed by row, column, and timestamp. # Required. The Table to create.
         # Each table is served using the resources of its parent cluster.
-      "clusterStates": { # Output only.
-          # Map from cluster ID to per-cluster table state.
+      "clusterStates": { # Output only. Map from cluster ID to per-cluster table state.
           # If it could not be determined whether or not the table has data in a
           # particular cluster (for example, if its zone is unavailable), then
           # there will be an entry for the cluster with UNKNOWN `replication_status`.
           # Views: `REPLICATION_VIEW`, `FULL`
         "a_key": { # The state of a table's data in a particular cluster.
-          "replicationState": "A String", # Output only.
-              # The state of replication for the table in this cluster.
+          "replicationState": "A String", # Output only. The state of replication for the table in this cluster.
         },
       },
       "columnFamilies": { # (`CreationOnly`)
@@ -198,9 +196,8 @@
           },
         },
       },
-      "name": "A String", # Output only.
-          # The unique name of the table. Values are of the form
-          # `projects/<project>/instances/<instance>/tables/_a-zA-Z0-9*`.
+      "name": "A String", # Output only. The unique name of the table. Values are of the form
+          # `projects/&lt;project&gt;/instances/&lt;instance&gt;/tables/_a-zA-Z0-9*`.
           # Views: `NAME_ONLY`, `SCHEMA_VIEW`, `REPLICATION_VIEW`, `FULL`
       "granularity": "A String", # (`CreationOnly`)
           # The granularity (i.e. `MILLIS`) at which timestamps are stored in
@@ -219,17 +216,18 @@
         #                `"other", "zz"]`
         # * initial_split_keys := `["apple", "customer_1", "customer_2", "other"]`
         # * Key assignment:
-        #     - Tablet 1 `[, apple)                => {"a"}.`
-        #     - Tablet 2 `[apple, customer_1)      => {"apple", "custom"}.`
-        #     - Tablet 3 `[customer_1, customer_2) => {"customer_1"}.`
-        #     - Tablet 4 `[customer_2, other)      => {"customer_2"}.`
-        #     - Tablet 5 `[other, )                => {"other", "zz"}.`
+        #     - Tablet 1 `[, apple)                =&gt; {"a"}.`
+        #     - Tablet 2 `[apple, customer_1)      =&gt; {"apple", "custom"}.`
+        #     - Tablet 3 `[customer_1, customer_2) =&gt; {"customer_1"}.`
+        #     - Tablet 4 `[customer_2, other)      =&gt; {"customer_2"}.`
+        #     - Tablet 5 `[other, )                =&gt; {"other", "zz"}.`
       { # An initial split point for a newly created table.
         "key": "A String", # Row key to use as an initial tablet boundary.
       },
     ],
-    "tableId": "A String", # The name by which the new table should be referred to within the parent
-        # instance, e.g., `foobar` rather than `<parent>/tables/foobar`.
+    "tableId": "A String", # Required. The name by which the new table should be referred to within the parent
+        # instance, e.g., `foobar` rather than `{parent}/tables/foobar`.
+        # Maximum 50 characters.
   }
 
   x__xgafv: string, V1 error format.
@@ -242,15 +240,13 @@
 
     { # A collection of user data indexed by row, column, and timestamp.
       # Each table is served using the resources of its parent cluster.
-    "clusterStates": { # Output only.
-        # Map from cluster ID to per-cluster table state.
+    "clusterStates": { # Output only. Map from cluster ID to per-cluster table state.
         # If it could not be determined whether or not the table has data in a
         # particular cluster (for example, if its zone is unavailable), then
         # there will be an entry for the cluster with UNKNOWN `replication_status`.
         # Views: `REPLICATION_VIEW`, `FULL`
       "a_key": { # The state of a table's data in a particular cluster.
-        "replicationState": "A String", # Output only.
-            # The state of replication for the table in this cluster.
+        "replicationState": "A String", # Output only. The state of replication for the table in this cluster.
       },
     },
     "columnFamilies": { # (`CreationOnly`)
@@ -280,9 +276,8 @@
         },
       },
     },
-    "name": "A String", # Output only.
-        # The unique name of the table. Values are of the form
-        # `projects/<project>/instances/<instance>/tables/_a-zA-Z0-9*`.
+    "name": "A String", # Output only. The unique name of the table. Values are of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/tables/_a-zA-Z0-9*`.
         # Views: `NAME_ONLY`, `SCHEMA_VIEW`, `REPLICATION_VIEW`, `FULL`
     "granularity": "A String", # (`CreationOnly`)
         # The granularity (i.e. `MILLIS`) at which timestamps are stored in
@@ -297,9 +292,9 @@
   <pre>Permanently deletes a specified table and all of its data.
 
 Args:
-  name: string, The unique name of the table to be deleted.
+  name: string, Required. The unique name of the table to be deleted.
 Values are of the form
-`projects/<project>/instances/<instance>/tables/<table>`. (required)
+`projects/{project}/instances/{instance}/tables/{table}`. (required)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -321,16 +316,16 @@
 </div>
 
 <div class="method">
-    <code class="details" id="dropRowRange">dropRowRange(name, body, x__xgafv=None)</code>
+    <code class="details" id="dropRowRange">dropRowRange(name, body=None, x__xgafv=None)</code>
   <pre>Permanently drop/delete a row range from a specified table. The request can
 specify whether to delete all rows in a table, or only those that match a
 particular prefix.
 
 Args:
-  name: string, The unique name of the table on which to drop a range of rows.
+  name: string, Required. The unique name of the table on which to drop a range of rows.
 Values are of the form
-`projects/<project>/instances/<instance>/tables/<table>`. (required)
-  body: object, The request body. (required)
+`projects/{project}/instances/{instance}/tables/{table}`. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request message for
@@ -368,9 +363,9 @@
 for 90 days.
 
 Args:
-  name: string, The unique name of the Table for which to create a consistency token.
+  name: string, Required. The unique name of the Table for which to create a consistency token.
 Values are of the form
-`projects/<project>/instances/<instance>/tables/<table>`. (required)
+`projects/{project}/instances/{instance}/tables/{table}`. (required)
   body: object, The request body.
     The object takes the form of:
 
@@ -397,9 +392,9 @@
   <pre>Gets metadata information about the specified table.
 
 Args:
-  name: string, The unique name of the requested table.
+  name: string, Required. The unique name of the requested table.
 Values are of the form
-`projects/<project>/instances/<instance>/tables/<table>`. (required)
+`projects/{project}/instances/{instance}/tables/{table}`. (required)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -412,15 +407,13 @@
 
     { # A collection of user data indexed by row, column, and timestamp.
       # Each table is served using the resources of its parent cluster.
-    "clusterStates": { # Output only.
-        # Map from cluster ID to per-cluster table state.
+    "clusterStates": { # Output only. Map from cluster ID to per-cluster table state.
         # If it could not be determined whether or not the table has data in a
         # particular cluster (for example, if its zone is unavailable), then
         # there will be an entry for the cluster with UNKNOWN `replication_status`.
         # Views: `REPLICATION_VIEW`, `FULL`
       "a_key": { # The state of a table's data in a particular cluster.
-        "replicationState": "A String", # Output only.
-            # The state of replication for the table in this cluster.
+        "replicationState": "A String", # Output only. The state of replication for the table in this cluster.
       },
     },
     "columnFamilies": { # (`CreationOnly`)
@@ -450,9 +443,8 @@
         },
       },
     },
-    "name": "A String", # Output only.
-        # The unique name of the table. Values are of the form
-        # `projects/<project>/instances/<instance>/tables/_a-zA-Z0-9*`.
+    "name": "A String", # Output only. The unique name of the table. Values are of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/tables/_a-zA-Z0-9*`.
         # Views: `NAME_ONLY`, `SCHEMA_VIEW`, `REPLICATION_VIEW`, `FULL`
     "granularity": "A String", # (`CreationOnly`)
         # The granularity (i.e. `MILLIS`) at which timestamps are stored in
@@ -464,8 +456,9 @@
 
 <div class="method">
     <code class="details" id="getIamPolicy">getIamPolicy(resource, body=None, x__xgafv=None)</code>
-  <pre>Gets the access control policy for an instance resource. Returns an empty
-policy if an table exists but does not have a policy set.
+  <pre>Gets the access control policy for a Table or Backup resource.
+Returns an empty policy if the resource exists but does not have a policy
+set.
 
 Args:
   resource: string, REQUIRED: The resource for which the policy is being requested.
@@ -474,6 +467,17 @@
     The object takes the form of:
 
 { # Request message for `GetIamPolicy` method.
+    "options": { # Encapsulates settings provided to GetIamPolicy. # OPTIONAL: A `GetPolicyOptions` object for specifying options to
+        # `GetIamPolicy`. This field is only used by Cloud IAM.
+      "requestedPolicyVersion": 42, # Optional. The policy format version to be returned.
+          #
+          # Valid values are 0, 1, and 3. Requests specifying an invalid value will be
+          # rejected.
+          #
+          # 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.
+    },
   }
 
   x__xgafv: string, V1 error format.
@@ -484,104 +488,69 @@
 Returns:
   An object of the form:
 
-    { # Defines an Identity and Access Management (IAM) policy. It is used to
-      # specify access control policies for Cloud Platform resources.
+    { # An Identity and Access Management (IAM) policy, which specifies access
+      # controls for Google Cloud resources.
       #
       #
-      # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
-      # `members` to a `role`, where the members can be user accounts, Google groups,
-      # Google domains, and service accounts. A `role` is a named list of permissions
-      # defined by IAM.
+      # A `Policy` is a collection of `bindings`. A `binding` binds one or more
+      # `members` to a single `role`. Members can be user accounts, service accounts,
+      # Google groups, and domains (such as G Suite). A `role` is a named list of
+      # permissions; each `role` can be an IAM predefined role or a user-created
+      # custom role.
       #
-      # **JSON Example**
+      # 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.
+      #
+      # **JSON example:**
       #
       #     {
       #       "bindings": [
       #         {
-      #           "role": "roles/owner",
+      #           "role": "roles/resourcemanager.organizationAdmin",
       #           "members": [
       #             "user:mike@example.com",
       #             "group:admins@example.com",
       #             "domain:google.com",
-      #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
+      #             "serviceAccount:my-project-id@appspot.gserviceaccount.com"
       #           ]
       #         },
       #         {
-      #           "role": "roles/viewer",
-      #           "members": ["user:sean@example.com"]
+      #           "role": "roles/resourcemanager.organizationViewer",
+      #           "members": ["user:eve@example.com"],
+      #           "condition": {
+      #             "title": "expirable access",
+      #             "description": "Does not grant access after Sep 2020",
+      #             "expression": "request.time &lt; timestamp('2020-10-01T00:00:00.000Z')",
+      #           }
       #         }
-      #       ]
+      #       ],
+      #       "etag": "BwWWja0YfJA=",
+      #       "version": 3
       #     }
       #
-      # **YAML Example**
+      # **YAML example:**
       #
       #     bindings:
       #     - members:
       #       - user:mike@example.com
       #       - group:admins@example.com
       #       - domain:google.com
-      #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
-      #       role: roles/owner
+      #       - serviceAccount:my-project-id@appspot.gserviceaccount.com
+      #       role: roles/resourcemanager.organizationAdmin
       #     - members:
-      #       - user:sean@example.com
-      #       role: roles/viewer
-      #
+      #       - user:eve@example.com
+      #       role: roles/resourcemanager.organizationViewer
+      #       condition:
+      #         title: expirable access
+      #         description: Does not grant access after Sep 2020
+      #         expression: request.time &lt; timestamp('2020-10-01T00:00:00.000Z')
+      #     - etag: BwWWja0YfJA=
+      #     - version: 3
       #
       # For a description of IAM and its features, see the
-      # [IAM developer's guide](https://cloud.google.com/iam/docs).
-    "bindings": [ # Associates a list of `members` to a `role`.
-        # `bindings` with no members will result in an error.
-      { # Associates `members` with a `role`.
-        "role": "A String", # Role that is assigned to `members`.
-            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
-        "condition": { # Represents an expression text. Example: # 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.
-            #
-            #     title: "User account presence"
-            #     description: "Determines whether the request has a user account"
-            #     expression: "size(request.user) > 0"
-          "description": "A String", # An optional description of the expression. This is a longer text which
-              # describes the expression, e.g. when hovered over it in a UI.
-          "expression": "A String", # Textual representation of an expression in
-              # Common Expression Language syntax.
-              #
-              # The application context of the containing message determines which
-              # well-known feature set of CEL is supported.
-          "location": "A String", # An optional string indicating the location of the expression for error
-              # reporting, e.g. a file name and a position in the file.
-          "title": "A String", # An 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.
-        },
-        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
-            # `members` can have the following values:
-            #
-            # * `allUsers`: A special identifier that represents anyone who is
-            #    on the internet; with or without a Google account.
-            #
-            # * `allAuthenticatedUsers`: A special identifier that represents anyone
-            #    who is authenticated with a Google account or a service account.
-            #
-            # * `user:{emailid}`: An email address that represents a specific Google
-            #    account. For example, `alice@gmail.com` .
-            #
-            #
-            # * `serviceAccount:{emailid}`: An email address that represents a service
-            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
-            #
-            # * `group:{emailid}`: An email address that represents a Google group.
-            #    For example, `admins@example.com`.
-            #
-            #
-            # * `domain:{domain}`: The G Suite domain (primary) that represents all the
-            #    users of that domain. For example, `google.com` or `example.com`.
-            #
-          "A String",
-        ],
-      },
-    ],
+      # [IAM documentation](https://cloud.google.com/iam/docs/).
     "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
       { # Specifies the audit configuration for a service.
           # The configuration determines which permission types are logged, and what
@@ -603,7 +572,7 @@
           #             {
           #               "log_type": "DATA_READ",
           #               "exempted_members": [
-          #                 "user:foo@gmail.com"
+          #                 "user:jose@example.com"
           #               ]
           #             },
           #             {
@@ -615,7 +584,7 @@
           #           ]
           #         },
           #         {
-          #           "service": "fooservice.googleapis.com"
+          #           "service": "sampleservice.googleapis.com"
           #           "audit_log_configs": [
           #             {
           #               "log_type": "DATA_READ",
@@ -623,7 +592,7 @@
           #             {
           #               "log_type": "DATA_WRITE",
           #               "exempted_members": [
-          #                 "user:bar@gmail.com"
+          #                 "user:aliya@example.com"
           #               ]
           #             }
           #           ]
@@ -631,9 +600,9 @@
           #       ]
           #     }
           #
-          # For fooservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
-          # logging. It also exempts foo@gmail.com from DATA_READ logging, and
-          # bar@gmail.com from DATA_WRITE logging.
+          # For sampleservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
+          # logging. It also exempts jose@example.com from DATA_READ logging, and
+          # aliya@example.com from DATA_WRITE logging.
         "auditLogConfigs": [ # The configuration for logging of each type of permission.
           { # Provides the configuration for logging a type of permissions.
               # Example:
@@ -643,7 +612,7 @@
               #         {
               #           "log_type": "DATA_READ",
               #           "exempted_members": [
-              #             "user:foo@gmail.com"
+              #             "user:jose@example.com"
               #           ]
               #         },
               #         {
@@ -653,7 +622,7 @@
               #     }
               #
               # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
-              # foo@gmail.com from DATA_READ logging.
+              # jose@example.com from DATA_READ logging.
             "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
                 # permission.
                 # Follows the same format of Binding.members.
@@ -667,6 +636,124 @@
             # `allServices` is a special value that covers all services.
       },
     ],
+    "version": 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.
+    "bindings": [ # 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`.
+        "role": "A String", # Role that is assigned to `members`.
+            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+            # `members` can have the following values:
+            #
+            # * `allUsers`: A special identifier that represents anyone who is
+            #    on the internet; with or without a Google account.
+            #
+            # * `allAuthenticatedUsers`: A special identifier that represents anyone
+            #    who is authenticated with a Google account or a service account.
+            #
+            # * `user:{emailid}`: An email address that represents a specific Google
+            #    account. For example, `alice@example.com` .
+            #
+            #
+            # * `serviceAccount:{emailid}`: An email address that represents a service
+            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+            #
+            # * `group:{emailid}`: An email address that represents a Google group.
+            #    For example, `admins@example.com`.
+            #
+            # * `deleted:user:{emailid}?uid={uniqueid}`: An email address (plus unique
+            #    identifier) representing a user that has been recently deleted. For
+            #    example, `alice@example.com?uid=123456789012345678901`. If the user is
+            #    recovered, this value reverts to `user:{emailid}` and the recovered user
+            #    retains the role in the binding.
+            #
+            # * `deleted:serviceAccount:{emailid}?uid={uniqueid}`: An email address (plus
+            #    unique identifier) representing a service account that has been recently
+            #    deleted. For example,
+            #    `my-other-app@appspot.gserviceaccount.com?uid=123456789012345678901`.
+            #    If the service account is undeleted, this value reverts to
+            #    `serviceAccount:{emailid}` and the undeleted service account retains the
+            #    role in the binding.
+            #
+            # * `deleted:group:{emailid}?uid={uniqueid}`: An email address (plus unique
+            #    identifier) representing a Google group that has been recently
+            #    deleted. For example, `admins@example.com?uid=123456789012345678901`. If
+            #    the group is recovered, this value reverts to `group:{emailid}` and the
+            #    recovered group retains the role in the binding.
+            #
+            #
+            # * `domain:{domain}`: The G Suite domain (primary) that represents all the
+            #    users of that domain. For example, `google.com` or `example.com`.
+            #
+          "A String",
+        ],
+        "condition": { # 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.
+            # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
+            # are documented at https://github.com/google/cel-spec.
+            #
+            # Example (Comparison):
+            #
+            #     title: "Summary size limit"
+            #     description: "Determines if a summary is less than 100 chars"
+            #     expression: "document.summary.size() &lt; 100"
+            #
+            # Example (Equality):
+            #
+            #     title: "Requestor is owner"
+            #     description: "Determines if requestor is the document owner"
+            #     expression: "document.owner == request.auth.claims.email"
+            #
+            # Example (Logic):
+            #
+            #     title: "Public documents"
+            #     description: "Determine whether the document should be publicly visible"
+            #     expression: "document.type != 'private' &amp;&amp; document.type != 'internal'"
+            #
+            # Example (Data Manipulation):
+            #
+            #     title: "Notification string"
+            #     description: "Create a notification string with a timestamp."
+            #     expression: "'New message received at ' + string(document.create_time)"
+            #
+            # The exact variables and functions that may be referenced within an expression
+            # are determined by the service that evaluates it. See the service
+            # documentation for additional information.
+          "description": "A String", # Optional. Description of the expression. This is a longer text which
+              # describes the expression, e.g. when hovered over it in a UI.
+          "expression": "A String", # Textual representation of an expression in Common Expression Language
+              # syntax.
+          "location": "A String", # Optional. String indicating the location of the expression for error
+              # reporting, e.g. a file name and a position in the file.
+          "title": "A String", # 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.
+        },
+      },
+    ],
     "etag": "A String", # `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
@@ -675,9 +762,10 @@
         # 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.
         #
-        # If no `etag` is provided in the call to `setIamPolicy`, then the existing
-        # policy is overwritten blindly.
-    "version": 42, # Deprecated.
+        # **Important:** If you use IAM Conditions, you must include the `etag` field
+        # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
+        # you to overwrite a version `3` policy with a version `1` policy, and all of
+        # the conditions in the version `3` policy are lost.
   }</pre>
 </div>
 
@@ -686,8 +774,8 @@
   <pre>Lists all tables served from a specified instance.
 
 Args:
-  parent: string, The unique name of the instance for which tables should be listed.
-Values are of the form `projects/<project>/instances/<instance>`. (required)
+  parent: string, Required. The unique name of the instance for which tables should be listed.
+Values are of the form `projects/{project}/instances/{instance}`. (required)
   pageToken: string, The value of `next_page_token` returned by a previous call.
   x__xgafv: string, V1 error format.
     Allowed values
@@ -703,7 +791,7 @@
 to pass a page_size. If a page_size is set in subsequent calls, it must
 match the page_size given in the first request.
   view: string, The view to be applied to the returned tables' fields.
-Defaults to `NAME_ONLY` if unspecified; no others are currently supported.
+Only NAME_ONLY view (default) and REPLICATION_VIEW are supported.
 
 Returns:
   An object of the form:
@@ -716,15 +804,13 @@
     "tables": [ # The tables present in the requested instance.
       { # A collection of user data indexed by row, column, and timestamp.
           # Each table is served using the resources of its parent cluster.
-        "clusterStates": { # Output only.
-            # Map from cluster ID to per-cluster table state.
+        "clusterStates": { # Output only. Map from cluster ID to per-cluster table state.
             # If it could not be determined whether or not the table has data in a
             # particular cluster (for example, if its zone is unavailable), then
             # there will be an entry for the cluster with UNKNOWN `replication_status`.
             # Views: `REPLICATION_VIEW`, `FULL`
           "a_key": { # The state of a table's data in a particular cluster.
-            "replicationState": "A String", # Output only.
-                # The state of replication for the table in this cluster.
+            "replicationState": "A String", # Output only. The state of replication for the table in this cluster.
           },
         },
         "columnFamilies": { # (`CreationOnly`)
@@ -754,9 +840,8 @@
             },
           },
         },
-        "name": "A String", # Output only.
-            # The unique name of the table. Values are of the form
-            # `projects/<project>/instances/<instance>/tables/_a-zA-Z0-9*`.
+        "name": "A String", # Output only. The unique name of the table. Values are of the form
+            # `projects/&lt;project&gt;/instances/&lt;instance&gt;/tables/_a-zA-Z0-9*`.
             # Views: `NAME_ONLY`, `SCHEMA_VIEW`, `REPLICATION_VIEW`, `FULL`
         "granularity": "A String", # (`CreationOnly`)
             # The granularity (i.e. `MILLIS`) at which timestamps are stored in
@@ -783,22 +868,22 @@
 </div>
 
 <div class="method">
-    <code class="details" id="modifyColumnFamilies">modifyColumnFamilies(name, body, x__xgafv=None)</code>
+    <code class="details" id="modifyColumnFamilies">modifyColumnFamilies(name, body=None, x__xgafv=None)</code>
   <pre>Performs a series of column family modifications on the specified table.
 Either all or none of the modifications will occur before this method
 returns, but data requests received prior to that point may see a table
 where only some modifications have taken effect.
 
 Args:
-  name: string, The unique name of the table whose families should be modified.
+  name: string, Required. The unique name of the table whose families should be modified.
 Values are of the form
-`projects/<project>/instances/<instance>/tables/<table>`. (required)
-  body: object, The request body. (required)
+`projects/{project}/instances/{instance}/tables/{table}`. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request message for
       # google.bigtable.admin.v2.BigtableTableAdmin.ModifyColumnFamilies
-    "modifications": [ # Modifications to be atomically applied to the specified table's families.
+    "modifications": [ # Required. Modifications to be atomically applied to the specified table's families.
         # Entries are applied in order, meaning that earlier modifications can be
         # masked by later ones (in the case of repeated updates to the same family,
         # for example).
@@ -829,6 +914,7 @@
         },
         "drop": True or False, # Drop (delete) the column family with the given ID, or fail if no such
             # family exists.
+        "id": "A String", # The ID of the column family to be modified.
         "update": { # A set of columns within a table which share a common configuration. # Update an existing column family to the specified schema, or fail
             # if no column family exists with the given ID.
           "gcRule": { # Rule for determining which cells to delete during garbage collection. # Garbage collection rule specified as a protobuf.
@@ -853,7 +939,6 @@
             "maxNumVersions": 42, # Delete all cells in a column except the most recent N.
           },
         },
-        "id": "A String", # The ID of the column family to be modified.
       },
     ],
   }
@@ -868,15 +953,13 @@
 
     { # A collection of user data indexed by row, column, and timestamp.
       # Each table is served using the resources of its parent cluster.
-    "clusterStates": { # Output only.
-        # Map from cluster ID to per-cluster table state.
+    "clusterStates": { # Output only. Map from cluster ID to per-cluster table state.
         # If it could not be determined whether or not the table has data in a
         # particular cluster (for example, if its zone is unavailable), then
         # there will be an entry for the cluster with UNKNOWN `replication_status`.
         # Views: `REPLICATION_VIEW`, `FULL`
       "a_key": { # The state of a table's data in a particular cluster.
-        "replicationState": "A String", # Output only.
-            # The state of replication for the table in this cluster.
+        "replicationState": "A String", # Output only. The state of replication for the table in this cluster.
       },
     },
     "columnFamilies": { # (`CreationOnly`)
@@ -906,9 +989,8 @@
         },
       },
     },
-    "name": "A String", # Output only.
-        # The unique name of the table. Values are of the form
-        # `projects/<project>/instances/<instance>/tables/_a-zA-Z0-9*`.
+    "name": "A String", # Output only. The unique name of the table. Values are of the form
+        # `projects/&lt;project&gt;/instances/&lt;instance&gt;/tables/_a-zA-Z0-9*`.
         # Views: `NAME_ONLY`, `SCHEMA_VIEW`, `REPLICATION_VIEW`, `FULL`
     "granularity": "A String", # (`CreationOnly`)
         # The granularity (i.e. `MILLIS`) at which timestamps are stored in
@@ -919,118 +1001,83 @@
 </div>
 
 <div class="method">
-    <code class="details" id="setIamPolicy">setIamPolicy(resource, body, x__xgafv=None)</code>
-  <pre>Sets the access control policy on a table resource. Replaces any existing
-policy.
+    <code class="details" id="setIamPolicy">setIamPolicy(resource, body=None, x__xgafv=None)</code>
+  <pre>Sets the access control policy on a Table or Backup resource.
+Replaces any existing policy.
 
 Args:
   resource: string, REQUIRED: The resource for which the policy is being specified.
 See the operation documentation for the appropriate value for this field. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request message for `SetIamPolicy` method.
-    "policy": { # Defines an Identity and Access Management (IAM) policy. It is used to # REQUIRED: The complete policy to be applied to the `resource`. The size of
+    "policy": { # An Identity and Access Management (IAM) policy, which specifies access # REQUIRED: The complete policy to be applied to the `resource`. The size of
         # the policy is limited to a few 10s of KB. An empty policy is a
         # valid policy but certain Cloud Platform services (such as Projects)
         # might reject them.
-        # specify access control policies for Cloud Platform resources.
+        # controls for Google Cloud resources.
         #
         #
-        # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
-        # `members` to a `role`, where the members can be user accounts, Google groups,
-        # Google domains, and service accounts. A `role` is a named list of permissions
-        # defined by IAM.
+        # A `Policy` is a collection of `bindings`. A `binding` binds one or more
+        # `members` to a single `role`. Members can be user accounts, service accounts,
+        # Google groups, and domains (such as G Suite). A `role` is a named list of
+        # permissions; each `role` can be an IAM predefined role or a user-created
+        # custom role.
         #
-        # **JSON Example**
+        # 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.
+        #
+        # **JSON example:**
         #
         #     {
         #       "bindings": [
         #         {
-        #           "role": "roles/owner",
+        #           "role": "roles/resourcemanager.organizationAdmin",
         #           "members": [
         #             "user:mike@example.com",
         #             "group:admins@example.com",
         #             "domain:google.com",
-        #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
+        #             "serviceAccount:my-project-id@appspot.gserviceaccount.com"
         #           ]
         #         },
         #         {
-        #           "role": "roles/viewer",
-        #           "members": ["user:sean@example.com"]
+        #           "role": "roles/resourcemanager.organizationViewer",
+        #           "members": ["user:eve@example.com"],
+        #           "condition": {
+        #             "title": "expirable access",
+        #             "description": "Does not grant access after Sep 2020",
+        #             "expression": "request.time &lt; timestamp('2020-10-01T00:00:00.000Z')",
+        #           }
         #         }
-        #       ]
+        #       ],
+        #       "etag": "BwWWja0YfJA=",
+        #       "version": 3
         #     }
         #
-        # **YAML Example**
+        # **YAML example:**
         #
         #     bindings:
         #     - members:
         #       - user:mike@example.com
         #       - group:admins@example.com
         #       - domain:google.com
-        #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
-        #       role: roles/owner
+        #       - serviceAccount:my-project-id@appspot.gserviceaccount.com
+        #       role: roles/resourcemanager.organizationAdmin
         #     - members:
-        #       - user:sean@example.com
-        #       role: roles/viewer
-        #
+        #       - user:eve@example.com
+        #       role: roles/resourcemanager.organizationViewer
+        #       condition:
+        #         title: expirable access
+        #         description: Does not grant access after Sep 2020
+        #         expression: request.time &lt; timestamp('2020-10-01T00:00:00.000Z')
+        #     - etag: BwWWja0YfJA=
+        #     - version: 3
         #
         # For a description of IAM and its features, see the
-        # [IAM developer's guide](https://cloud.google.com/iam/docs).
-      "bindings": [ # Associates a list of `members` to a `role`.
-          # `bindings` with no members will result in an error.
-        { # Associates `members` with a `role`.
-          "role": "A String", # Role that is assigned to `members`.
-              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
-          "condition": { # Represents an expression text. Example: # 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.
-              #
-              #     title: "User account presence"
-              #     description: "Determines whether the request has a user account"
-              #     expression: "size(request.user) > 0"
-            "description": "A String", # An optional description of the expression. This is a longer text which
-                # describes the expression, e.g. when hovered over it in a UI.
-            "expression": "A String", # Textual representation of an expression in
-                # Common Expression Language syntax.
-                #
-                # The application context of the containing message determines which
-                # well-known feature set of CEL is supported.
-            "location": "A String", # An optional string indicating the location of the expression for error
-                # reporting, e.g. a file name and a position in the file.
-            "title": "A String", # An 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.
-          },
-          "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
-              # `members` can have the following values:
-              #
-              # * `allUsers`: A special identifier that represents anyone who is
-              #    on the internet; with or without a Google account.
-              #
-              # * `allAuthenticatedUsers`: A special identifier that represents anyone
-              #    who is authenticated with a Google account or a service account.
-              #
-              # * `user:{emailid}`: An email address that represents a specific Google
-              #    account. For example, `alice@gmail.com` .
-              #
-              #
-              # * `serviceAccount:{emailid}`: An email address that represents a service
-              #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
-              #
-              # * `group:{emailid}`: An email address that represents a Google group.
-              #    For example, `admins@example.com`.
-              #
-              #
-              # * `domain:{domain}`: The G Suite domain (primary) that represents all the
-              #    users of that domain. For example, `google.com` or `example.com`.
-              #
-            "A String",
-          ],
-        },
-      ],
+        # [IAM documentation](https://cloud.google.com/iam/docs/).
       "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
         { # Specifies the audit configuration for a service.
             # The configuration determines which permission types are logged, and what
@@ -1052,7 +1099,7 @@
             #             {
             #               "log_type": "DATA_READ",
             #               "exempted_members": [
-            #                 "user:foo@gmail.com"
+            #                 "user:jose@example.com"
             #               ]
             #             },
             #             {
@@ -1064,7 +1111,7 @@
             #           ]
             #         },
             #         {
-            #           "service": "fooservice.googleapis.com"
+            #           "service": "sampleservice.googleapis.com"
             #           "audit_log_configs": [
             #             {
             #               "log_type": "DATA_READ",
@@ -1072,7 +1119,7 @@
             #             {
             #               "log_type": "DATA_WRITE",
             #               "exempted_members": [
-            #                 "user:bar@gmail.com"
+            #                 "user:aliya@example.com"
             #               ]
             #             }
             #           ]
@@ -1080,9 +1127,9 @@
             #       ]
             #     }
             #
-            # For fooservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
-            # logging. It also exempts foo@gmail.com from DATA_READ logging, and
-            # bar@gmail.com from DATA_WRITE logging.
+            # For sampleservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
+            # logging. It also exempts jose@example.com from DATA_READ logging, and
+            # aliya@example.com from DATA_WRITE logging.
           "auditLogConfigs": [ # The configuration for logging of each type of permission.
             { # Provides the configuration for logging a type of permissions.
                 # Example:
@@ -1092,7 +1139,7 @@
                 #         {
                 #           "log_type": "DATA_READ",
                 #           "exempted_members": [
-                #             "user:foo@gmail.com"
+                #             "user:jose@example.com"
                 #           ]
                 #         },
                 #         {
@@ -1102,7 +1149,7 @@
                 #     }
                 #
                 # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
-                # foo@gmail.com from DATA_READ logging.
+                # jose@example.com from DATA_READ logging.
               "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
                   # permission.
                   # Follows the same format of Binding.members.
@@ -1116,6 +1163,124 @@
               # `allServices` is a special value that covers all services.
         },
       ],
+      "version": 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.
+      "bindings": [ # 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`.
+          "role": "A String", # Role that is assigned to `members`.
+              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+          "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+              # `members` can have the following values:
+              #
+              # * `allUsers`: A special identifier that represents anyone who is
+              #    on the internet; with or without a Google account.
+              #
+              # * `allAuthenticatedUsers`: A special identifier that represents anyone
+              #    who is authenticated with a Google account or a service account.
+              #
+              # * `user:{emailid}`: An email address that represents a specific Google
+              #    account. For example, `alice@example.com` .
+              #
+              #
+              # * `serviceAccount:{emailid}`: An email address that represents a service
+              #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+              #
+              # * `group:{emailid}`: An email address that represents a Google group.
+              #    For example, `admins@example.com`.
+              #
+              # * `deleted:user:{emailid}?uid={uniqueid}`: An email address (plus unique
+              #    identifier) representing a user that has been recently deleted. For
+              #    example, `alice@example.com?uid=123456789012345678901`. If the user is
+              #    recovered, this value reverts to `user:{emailid}` and the recovered user
+              #    retains the role in the binding.
+              #
+              # * `deleted:serviceAccount:{emailid}?uid={uniqueid}`: An email address (plus
+              #    unique identifier) representing a service account that has been recently
+              #    deleted. For example,
+              #    `my-other-app@appspot.gserviceaccount.com?uid=123456789012345678901`.
+              #    If the service account is undeleted, this value reverts to
+              #    `serviceAccount:{emailid}` and the undeleted service account retains the
+              #    role in the binding.
+              #
+              # * `deleted:group:{emailid}?uid={uniqueid}`: An email address (plus unique
+              #    identifier) representing a Google group that has been recently
+              #    deleted. For example, `admins@example.com?uid=123456789012345678901`. If
+              #    the group is recovered, this value reverts to `group:{emailid}` and the
+              #    recovered group retains the role in the binding.
+              #
+              #
+              # * `domain:{domain}`: The G Suite domain (primary) that represents all the
+              #    users of that domain. For example, `google.com` or `example.com`.
+              #
+            "A String",
+          ],
+          "condition": { # 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.
+              # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
+              # are documented at https://github.com/google/cel-spec.
+              #
+              # Example (Comparison):
+              #
+              #     title: "Summary size limit"
+              #     description: "Determines if a summary is less than 100 chars"
+              #     expression: "document.summary.size() &lt; 100"
+              #
+              # Example (Equality):
+              #
+              #     title: "Requestor is owner"
+              #     description: "Determines if requestor is the document owner"
+              #     expression: "document.owner == request.auth.claims.email"
+              #
+              # Example (Logic):
+              #
+              #     title: "Public documents"
+              #     description: "Determine whether the document should be publicly visible"
+              #     expression: "document.type != 'private' &amp;&amp; document.type != 'internal'"
+              #
+              # Example (Data Manipulation):
+              #
+              #     title: "Notification string"
+              #     description: "Create a notification string with a timestamp."
+              #     expression: "'New message received at ' + string(document.create_time)"
+              #
+              # The exact variables and functions that may be referenced within an expression
+              # are determined by the service that evaluates it. See the service
+              # documentation for additional information.
+            "description": "A String", # Optional. Description of the expression. This is a longer text which
+                # describes the expression, e.g. when hovered over it in a UI.
+            "expression": "A String", # Textual representation of an expression in Common Expression Language
+                # syntax.
+            "location": "A String", # Optional. String indicating the location of the expression for error
+                # reporting, e.g. a file name and a position in the file.
+            "title": "A String", # 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.
+          },
+        },
+      ],
       "etag": "A String", # `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
@@ -1124,9 +1289,10 @@
           # 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.
           #
-          # If no `etag` is provided in the call to `setIamPolicy`, then the existing
-          # policy is overwritten blindly.
-      "version": 42, # Deprecated.
+          # **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.
     },
     "updateMask": "A String", # OPTIONAL: A FieldMask specifying which fields of the policy to modify. Only
         # the fields in the mask will be modified. If no mask is provided, the
@@ -1143,104 +1309,69 @@
 Returns:
   An object of the form:
 
-    { # Defines an Identity and Access Management (IAM) policy. It is used to
-      # specify access control policies for Cloud Platform resources.
+    { # An Identity and Access Management (IAM) policy, which specifies access
+      # controls for Google Cloud resources.
       #
       #
-      # A `Policy` consists of a list of `bindings`. A `binding` binds a list of
-      # `members` to a `role`, where the members can be user accounts, Google groups,
-      # Google domains, and service accounts. A `role` is a named list of permissions
-      # defined by IAM.
+      # A `Policy` is a collection of `bindings`. A `binding` binds one or more
+      # `members` to a single `role`. Members can be user accounts, service accounts,
+      # Google groups, and domains (such as G Suite). A `role` is a named list of
+      # permissions; each `role` can be an IAM predefined role or a user-created
+      # custom role.
       #
-      # **JSON Example**
+      # 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.
+      #
+      # **JSON example:**
       #
       #     {
       #       "bindings": [
       #         {
-      #           "role": "roles/owner",
+      #           "role": "roles/resourcemanager.organizationAdmin",
       #           "members": [
       #             "user:mike@example.com",
       #             "group:admins@example.com",
       #             "domain:google.com",
-      #             "serviceAccount:my-other-app@appspot.gserviceaccount.com"
+      #             "serviceAccount:my-project-id@appspot.gserviceaccount.com"
       #           ]
       #         },
       #         {
-      #           "role": "roles/viewer",
-      #           "members": ["user:sean@example.com"]
+      #           "role": "roles/resourcemanager.organizationViewer",
+      #           "members": ["user:eve@example.com"],
+      #           "condition": {
+      #             "title": "expirable access",
+      #             "description": "Does not grant access after Sep 2020",
+      #             "expression": "request.time &lt; timestamp('2020-10-01T00:00:00.000Z')",
+      #           }
       #         }
-      #       ]
+      #       ],
+      #       "etag": "BwWWja0YfJA=",
+      #       "version": 3
       #     }
       #
-      # **YAML Example**
+      # **YAML example:**
       #
       #     bindings:
       #     - members:
       #       - user:mike@example.com
       #       - group:admins@example.com
       #       - domain:google.com
-      #       - serviceAccount:my-other-app@appspot.gserviceaccount.com
-      #       role: roles/owner
+      #       - serviceAccount:my-project-id@appspot.gserviceaccount.com
+      #       role: roles/resourcemanager.organizationAdmin
       #     - members:
-      #       - user:sean@example.com
-      #       role: roles/viewer
-      #
+      #       - user:eve@example.com
+      #       role: roles/resourcemanager.organizationViewer
+      #       condition:
+      #         title: expirable access
+      #         description: Does not grant access after Sep 2020
+      #         expression: request.time &lt; timestamp('2020-10-01T00:00:00.000Z')
+      #     - etag: BwWWja0YfJA=
+      #     - version: 3
       #
       # For a description of IAM and its features, see the
-      # [IAM developer's guide](https://cloud.google.com/iam/docs).
-    "bindings": [ # Associates a list of `members` to a `role`.
-        # `bindings` with no members will result in an error.
-      { # Associates `members` with a `role`.
-        "role": "A String", # Role that is assigned to `members`.
-            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
-        "condition": { # Represents an expression text. Example: # 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.
-            #
-            #     title: "User account presence"
-            #     description: "Determines whether the request has a user account"
-            #     expression: "size(request.user) > 0"
-          "description": "A String", # An optional description of the expression. This is a longer text which
-              # describes the expression, e.g. when hovered over it in a UI.
-          "expression": "A String", # Textual representation of an expression in
-              # Common Expression Language syntax.
-              #
-              # The application context of the containing message determines which
-              # well-known feature set of CEL is supported.
-          "location": "A String", # An optional string indicating the location of the expression for error
-              # reporting, e.g. a file name and a position in the file.
-          "title": "A String", # An 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.
-        },
-        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
-            # `members` can have the following values:
-            #
-            # * `allUsers`: A special identifier that represents anyone who is
-            #    on the internet; with or without a Google account.
-            #
-            # * `allAuthenticatedUsers`: A special identifier that represents anyone
-            #    who is authenticated with a Google account or a service account.
-            #
-            # * `user:{emailid}`: An email address that represents a specific Google
-            #    account. For example, `alice@gmail.com` .
-            #
-            #
-            # * `serviceAccount:{emailid}`: An email address that represents a service
-            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
-            #
-            # * `group:{emailid}`: An email address that represents a Google group.
-            #    For example, `admins@example.com`.
-            #
-            #
-            # * `domain:{domain}`: The G Suite domain (primary) that represents all the
-            #    users of that domain. For example, `google.com` or `example.com`.
-            #
-          "A String",
-        ],
-      },
-    ],
+      # [IAM documentation](https://cloud.google.com/iam/docs/).
     "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
       { # Specifies the audit configuration for a service.
           # The configuration determines which permission types are logged, and what
@@ -1262,7 +1393,7 @@
           #             {
           #               "log_type": "DATA_READ",
           #               "exempted_members": [
-          #                 "user:foo@gmail.com"
+          #                 "user:jose@example.com"
           #               ]
           #             },
           #             {
@@ -1274,7 +1405,7 @@
           #           ]
           #         },
           #         {
-          #           "service": "fooservice.googleapis.com"
+          #           "service": "sampleservice.googleapis.com"
           #           "audit_log_configs": [
           #             {
           #               "log_type": "DATA_READ",
@@ -1282,7 +1413,7 @@
           #             {
           #               "log_type": "DATA_WRITE",
           #               "exempted_members": [
-          #                 "user:bar@gmail.com"
+          #                 "user:aliya@example.com"
           #               ]
           #             }
           #           ]
@@ -1290,9 +1421,9 @@
           #       ]
           #     }
           #
-          # For fooservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
-          # logging. It also exempts foo@gmail.com from DATA_READ logging, and
-          # bar@gmail.com from DATA_WRITE logging.
+          # For sampleservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ
+          # logging. It also exempts jose@example.com from DATA_READ logging, and
+          # aliya@example.com from DATA_WRITE logging.
         "auditLogConfigs": [ # The configuration for logging of each type of permission.
           { # Provides the configuration for logging a type of permissions.
               # Example:
@@ -1302,7 +1433,7 @@
               #         {
               #           "log_type": "DATA_READ",
               #           "exempted_members": [
-              #             "user:foo@gmail.com"
+              #             "user:jose@example.com"
               #           ]
               #         },
               #         {
@@ -1312,7 +1443,7 @@
               #     }
               #
               # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
-              # foo@gmail.com from DATA_READ logging.
+              # jose@example.com from DATA_READ logging.
             "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
                 # permission.
                 # Follows the same format of Binding.members.
@@ -1326,6 +1457,124 @@
             # `allServices` is a special value that covers all services.
       },
     ],
+    "version": 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.
+    "bindings": [ # 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`.
+        "role": "A String", # Role that is assigned to `members`.
+            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+            # `members` can have the following values:
+            #
+            # * `allUsers`: A special identifier that represents anyone who is
+            #    on the internet; with or without a Google account.
+            #
+            # * `allAuthenticatedUsers`: A special identifier that represents anyone
+            #    who is authenticated with a Google account or a service account.
+            #
+            # * `user:{emailid}`: An email address that represents a specific Google
+            #    account. For example, `alice@example.com` .
+            #
+            #
+            # * `serviceAccount:{emailid}`: An email address that represents a service
+            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+            #
+            # * `group:{emailid}`: An email address that represents a Google group.
+            #    For example, `admins@example.com`.
+            #
+            # * `deleted:user:{emailid}?uid={uniqueid}`: An email address (plus unique
+            #    identifier) representing a user that has been recently deleted. For
+            #    example, `alice@example.com?uid=123456789012345678901`. If the user is
+            #    recovered, this value reverts to `user:{emailid}` and the recovered user
+            #    retains the role in the binding.
+            #
+            # * `deleted:serviceAccount:{emailid}?uid={uniqueid}`: An email address (plus
+            #    unique identifier) representing a service account that has been recently
+            #    deleted. For example,
+            #    `my-other-app@appspot.gserviceaccount.com?uid=123456789012345678901`.
+            #    If the service account is undeleted, this value reverts to
+            #    `serviceAccount:{emailid}` and the undeleted service account retains the
+            #    role in the binding.
+            #
+            # * `deleted:group:{emailid}?uid={uniqueid}`: An email address (plus unique
+            #    identifier) representing a Google group that has been recently
+            #    deleted. For example, `admins@example.com?uid=123456789012345678901`. If
+            #    the group is recovered, this value reverts to `group:{emailid}` and the
+            #    recovered group retains the role in the binding.
+            #
+            #
+            # * `domain:{domain}`: The G Suite domain (primary) that represents all the
+            #    users of that domain. For example, `google.com` or `example.com`.
+            #
+          "A String",
+        ],
+        "condition": { # 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.
+            # syntax. CEL is a C-like expression language. The syntax and semantics of CEL
+            # are documented at https://github.com/google/cel-spec.
+            #
+            # Example (Comparison):
+            #
+            #     title: "Summary size limit"
+            #     description: "Determines if a summary is less than 100 chars"
+            #     expression: "document.summary.size() &lt; 100"
+            #
+            # Example (Equality):
+            #
+            #     title: "Requestor is owner"
+            #     description: "Determines if requestor is the document owner"
+            #     expression: "document.owner == request.auth.claims.email"
+            #
+            # Example (Logic):
+            #
+            #     title: "Public documents"
+            #     description: "Determine whether the document should be publicly visible"
+            #     expression: "document.type != 'private' &amp;&amp; document.type != 'internal'"
+            #
+            # Example (Data Manipulation):
+            #
+            #     title: "Notification string"
+            #     description: "Create a notification string with a timestamp."
+            #     expression: "'New message received at ' + string(document.create_time)"
+            #
+            # The exact variables and functions that may be referenced within an expression
+            # are determined by the service that evaluates it. See the service
+            # documentation for additional information.
+          "description": "A String", # Optional. Description of the expression. This is a longer text which
+              # describes the expression, e.g. when hovered over it in a UI.
+          "expression": "A String", # Textual representation of an expression in Common Expression Language
+              # syntax.
+          "location": "A String", # Optional. String indicating the location of the expression for error
+              # reporting, e.g. a file name and a position in the file.
+          "title": "A String", # 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.
+        },
+      },
+    ],
     "etag": "A String", # `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
@@ -1334,20 +1583,21 @@
         # 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.
         #
-        # If no `etag` is provided in the call to `setIamPolicy`, then the existing
-        # policy is overwritten blindly.
-    "version": 42, # Deprecated.
+        # **Important:** If you use IAM Conditions, you must include the `etag` field
+        # whenever you call `setIamPolicy`. If you omit this field, then IAM allows
+        # you to overwrite a version `3` policy with a version `1` policy, and all of
+        # the conditions in the version `3` policy are lost.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="testIamPermissions">testIamPermissions(resource, body, x__xgafv=None)</code>
+    <code class="details" id="testIamPermissions">testIamPermissions(resource, body=None, x__xgafv=None)</code>
   <pre>Returns permissions that the caller has on the specified table resource.
 
 Args:
   resource: string, REQUIRED: The resource for which the policy detail is being requested.
 See the operation documentation for the appropriate value for this field. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request message for `TestIamPermissions` method.