chore: regens API reference docs (#889)

diff --git a/docs/dyn/compute_alpha.licenseCodes.html b/docs/dyn/compute_alpha.licenseCodes.html
index 87efa12..4fa1610 100644
--- a/docs/dyn/compute_alpha.licenseCodes.html
+++ b/docs/dyn/compute_alpha.licenseCodes.html
@@ -76,20 +76,20 @@
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="#get">get(project, licenseCode)</a></code></p>
-<p class="firstline">Return a specified license code. License codes are mirrored across all projects that have permissions to read the License Code.</p>
+<p class="firstline">Return a specified license code. License codes are mirrored across all projects that have permissions to read the License Code.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.</p>
 <p class="toc_element">
-  <code><a href="#getIamPolicy">getIamPolicy(project, resource)</a></code></p>
-<p class="firstline">Gets the access control policy for a resource. May be empty if no such policy or resource exists.</p>
+  <code><a href="#getIamPolicy">getIamPolicy(project, resource, optionsRequestedPolicyVersion=None)</a></code></p>
+<p class="firstline">Gets the access control policy for a resource. May be empty if no such policy or resource exists.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.</p>
 <p class="toc_element">
-  <code><a href="#setIamPolicy">setIamPolicy(project, resource, body)</a></code></p>
-<p class="firstline">Sets the access control policy on the specified resource. Replaces any existing policy.</p>
+  <code><a href="#setIamPolicy">setIamPolicy(project, resource, body=None)</a></code></p>
+<p class="firstline">Sets the access control policy on the specified resource. Replaces any existing policy.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.</p>
 <p class="toc_element">
-  <code><a href="#testIamPermissions">testIamPermissions(project, resource, body)</a></code></p>
-<p class="firstline">Returns permissions that a caller has on the specified resource.</p>
+  <code><a href="#testIamPermissions">testIamPermissions(project, resource, body=None)</a></code></p>
+<p class="firstline">Returns permissions that a caller has on the specified resource.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.</p>
 <h3>Method Details</h3>
 <div class="method">
     <code class="details" id="get">get(project, licenseCode)</code>
-  <pre>Return a specified license code. License codes are mirrored across all projects that have permissions to read the License Code.
+  <pre>Return a specified license code. License codes are mirrored across all projects that have permissions to read the License Code.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.
 
 Args:
   project: string, Project ID for this request. (required)
@@ -98,7 +98,9 @@
 Returns:
   An object of the form:
 
-    {
+    { # Represents a License Code resource.
+      #
+      # A License Code is a unique identifier used to represent a license resource.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images. (== resource_for {$api_version}.licenseCodes ==)
     "kind": "compute#licenseCode", # [Output Only] Type of resource. Always compute#licenseCode for licenses.
     "description": "A String", # [Output Only] Description of this License Code.
     "transferable": True or False, # [Output Only] If true, the license will remain attached when creating images or snapshots from disks. Otherwise, the license is not transferred.
@@ -117,33 +119,34 @@
 </div>
 
 <div class="method">
-    <code class="details" id="getIamPolicy">getIamPolicy(project, resource)</code>
-  <pre>Gets the access control policy for a resource. May be empty if no such policy or resource exists.
+    <code class="details" id="getIamPolicy">getIamPolicy(project, resource, optionsRequestedPolicyVersion=None)</code>
+  <pre>Gets the access control policy for a resource. May be empty if no such policy or resource exists.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.
 
 Args:
   project: string, Project ID for this request. (required)
   resource: string, Name or id of the resource for this request. (required)
+  optionsRequestedPolicyVersion: integer, Requested IAM Policy version.
 
 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.
       #
-      # { "bindings": [ { "role": "roles/owner", "members": [ "user:mike@example.com", "group:admins@example.com", "domain:google.com", "serviceAccount:my-other-app@appspot.gserviceaccount.com" ] }, { "role": "roles/viewer", "members": ["user:sean@example.com"] } ] }
+      # **JSON example:**
       #
-      # **YAML Example**
+      # { "bindings": [ { "role": "roles/resourcemanager.organizationAdmin", "members": [ "user:mike@example.com", "group:admins@example.com", "domain:google.com", "serviceAccount:my-project-id@appspot.gserviceaccount.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 }
       #
-      # bindings: - members: - user:mike@example.com - group:admins@example.com - domain:google.com - serviceAccount:my-other-app@appspot.gserviceaccount.com role: roles/owner - members: - user:sean@example.com role: roles/viewer
+      # **YAML example:**
       #
+      # bindings: - members: - user:mike@example.com - group:admins@example.com - domain:google.com - serviceAccount:my-project-id@appspot.gserviceaccount.com role: roles/resourcemanager.organizationAdmin - members: - 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).
+      # For a description of IAM and its features, see the [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 identities, if any, are exempted from logging. An AuditConfig must have one or more AuditLogConfigs.
           #
@@ -151,21 +154,22 @@
           #
           # Example Policy with multiple AuditConfigs:
           #
-          # { "audit_configs": [ { "service": "allServices" "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:foo@gmail.com" ] }, { "log_type": "DATA_WRITE", }, { "log_type": "ADMIN_READ", } ] }, { "service": "fooservice.googleapis.com" "audit_log_configs": [ { "log_type": "DATA_READ", }, { "log_type": "DATA_WRITE", "exempted_members": [ "user:bar@gmail.com" ] } ] } ] }
+          # { "audit_configs": [ { "service": "allServices" "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:jose@example.com" ] }, { "log_type": "DATA_WRITE", }, { "log_type": "ADMIN_READ", } ] }, { "service": "sampleservice.googleapis.com" "audit_log_configs": [ { "log_type": "DATA_READ", }, { "log_type": "DATA_WRITE", "exempted_members": [ "user:aliya@example.com" ] } ] } ] }
           #
-          # 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.
         "exemptedMembers": [
           "A String",
         ],
         "auditLogConfigs": [ # The configuration for logging of each type of permission.
           { # Provides the configuration for logging a type of permissions. Example:
               #
-              # { "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:foo@gmail.com" ] }, { "log_type": "DATA_WRITE", } ] }
+              # { "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:jose@example.com" ] }, { "log_type": "DATA_WRITE", } ] }
               #
-              # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting foo@gmail.com from DATA_READ logging.
+              # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting 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][].
               "A String",
             ],
+            "ignoreChildExemptions": True or False,
             "logType": "A String", # The log type that this config enables.
           },
         ],
@@ -184,14 +188,18 @@
                 #
                 # Supported field names: - "authority", which is "[token]" if IAMContext.token is present, otherwise the value of IAMContext.authority_selector if present, and otherwise a representation of IAMContext.principal; or - "iam_principal", a representation of IAMContext.principal even if a token or authority selector is present; or - "" (empty string), resulting in a counter with no fields.
                 #
-                # Examples: counter { metric: "/debug_access_count" field: "iam_principal" } ==> increment counter /iam/policy/backend_debug_access_count {iam_principal=[value of IAMContext.principal]}
-                #
-                # At this time we do not support multiple field names (though this may be supported in the future).
+                # Examples: counter { metric: "/debug_access_count" field: "iam_principal" } ==&gt; increment counter /iam/policy/debug_access_count {iam_principal=[value of IAMContext.principal]}
               "field": "A String", # The field value to attribute.
+              "customFields": [ # Custom fields.
+                { # Custom fields. These can be used to create a counter with arbitrary field/value pairs. See: go/rpcsp-custom-fields.
+                  "name": "A String", # Name is the field name.
+                  "value": "A String", # Value is the field value. It is important that in contrast to the CounterOptions.field, the value here is a constant that is not derived from the IAMContext.
+                },
+              ],
               "metric": "A String", # The metric to update.
             },
             "dataAccess": { # Write a Data Access (Gin) log # Data access options.
-              "logMode": "A String", # Whether Gin logging should happen in a fail-closed manner at the caller. This is relevant only in the LocalIAM implementation, for now.
+              "logMode": "A String", # Whether Gin logging should happen in a fail-closed manner at the caller. This is currently supported in the LocalIAM implementation, Stubby C++, and Stubby Java. For Apps Framework, see go/af-audit-logging#failclosed. TODO(b/77591626): Add support for Stubby Go. TODO(b/129671387): Add support for Scaffolding.
             },
             "cloudAudit": { # Write a Cloud Audit log # Cloud audit options.
               "logName": "A String", # The log_name to populate in the Cloud Audit Record.
@@ -225,11 +233,21 @@
         "description": "A String", # Human-readable description of the rule.
       },
     ],
-    "version": 42, # Deprecated.
+    "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.
     "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 read-modify-write cycle to perform policy updates in order to avoid race conditions: An `etag` is returned in the response to `getIamPolicy`, and systems are expected to put that etag in the request to `setIamPolicy` to ensure that their change will be applied to the same version of the policy.
         #
-        # If no `etag` is provided in the call to `setIamPolicy`, then the existing policy is overwritten blindly.
-    "bindings": [ # Associates a list of `members` to a `role`. `bindings` with no members will result in an error.
+        # **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.
+    "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:
@@ -238,7 +256,7 @@
             #
             # * `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` .
+            # * `user:{emailid}`: An email address that represents a specific Google account. For example, `alice@example.com` .
             #
             #
             #
@@ -246,20 +264,40 @@
             #
             # * `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 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.
+        "condition": { # Represents a textual expression in the Common Expression Language (CEL) syntax. CEL is a C-like expression language. The syntax and semantics of CEL are documented at https://github.com/google/cel-spec. # 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"
-          "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.
+            # 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.
+          "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.
           "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.
-          "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.
-          "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.
+          "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.
+          "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.
         },
       },
     ],
@@ -268,33 +306,33 @@
 </div>
 
 <div class="method">
-    <code class="details" id="setIamPolicy">setIamPolicy(project, resource, body)</code>
-  <pre>Sets the access control policy on the specified resource. Replaces any existing policy.
+    <code class="details" id="setIamPolicy">setIamPolicy(project, resource, body=None)</code>
+  <pre>Sets the access control policy on the specified resource. Replaces any existing policy.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.
 
 Args:
   project: string, Project ID for this request. (required)
   resource: string, Name or id of the resource for this request. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {
-    "policy": { # Defines an Identity and Access Management (IAM) policy. It is used to specify access control policies for Cloud Platform resources. # 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 in general a valid policy but certain services (like Projects) might reject them.
+    "policy": { # An Identity and Access Management (IAM) policy, which specifies access controls for Google Cloud resources. # 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 in general a valid policy but certain services (like Projects) might reject them.
         #
         #
         #
-        # 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.
         #
-        # { "bindings": [ { "role": "roles/owner", "members": [ "user:mike@example.com", "group:admins@example.com", "domain:google.com", "serviceAccount:my-other-app@appspot.gserviceaccount.com" ] }, { "role": "roles/viewer", "members": ["user:sean@example.com"] } ] }
+        # **JSON example:**
         #
-        # **YAML Example**
+        # { "bindings": [ { "role": "roles/resourcemanager.organizationAdmin", "members": [ "user:mike@example.com", "group:admins@example.com", "domain:google.com", "serviceAccount:my-project-id@appspot.gserviceaccount.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 }
         #
-        # bindings: - members: - user:mike@example.com - group:admins@example.com - domain:google.com - serviceAccount:my-other-app@appspot.gserviceaccount.com role: roles/owner - members: - user:sean@example.com role: roles/viewer
+        # **YAML example:**
         #
+        # bindings: - members: - user:mike@example.com - group:admins@example.com - domain:google.com - serviceAccount:my-project-id@appspot.gserviceaccount.com role: roles/resourcemanager.organizationAdmin - members: - 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).
+        # For a description of IAM and its features, see the [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 identities, if any, are exempted from logging. An AuditConfig must have one or more AuditLogConfigs.
             #
@@ -302,21 +340,22 @@
             #
             # Example Policy with multiple AuditConfigs:
             #
-            # { "audit_configs": [ { "service": "allServices" "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:foo@gmail.com" ] }, { "log_type": "DATA_WRITE", }, { "log_type": "ADMIN_READ", } ] }, { "service": "fooservice.googleapis.com" "audit_log_configs": [ { "log_type": "DATA_READ", }, { "log_type": "DATA_WRITE", "exempted_members": [ "user:bar@gmail.com" ] } ] } ] }
+            # { "audit_configs": [ { "service": "allServices" "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:jose@example.com" ] }, { "log_type": "DATA_WRITE", }, { "log_type": "ADMIN_READ", } ] }, { "service": "sampleservice.googleapis.com" "audit_log_configs": [ { "log_type": "DATA_READ", }, { "log_type": "DATA_WRITE", "exempted_members": [ "user:aliya@example.com" ] } ] } ] }
             #
-            # 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.
           "exemptedMembers": [
             "A String",
           ],
           "auditLogConfigs": [ # The configuration for logging of each type of permission.
             { # Provides the configuration for logging a type of permissions. Example:
                 #
-                # { "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:foo@gmail.com" ] }, { "log_type": "DATA_WRITE", } ] }
+                # { "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:jose@example.com" ] }, { "log_type": "DATA_WRITE", } ] }
                 #
-                # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting foo@gmail.com from DATA_READ logging.
+                # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting 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][].
                 "A String",
               ],
+              "ignoreChildExemptions": True or False,
               "logType": "A String", # The log type that this config enables.
             },
           ],
@@ -335,14 +374,18 @@
                   #
                   # Supported field names: - "authority", which is "[token]" if IAMContext.token is present, otherwise the value of IAMContext.authority_selector if present, and otherwise a representation of IAMContext.principal; or - "iam_principal", a representation of IAMContext.principal even if a token or authority selector is present; or - "" (empty string), resulting in a counter with no fields.
                   #
-                  # Examples: counter { metric: "/debug_access_count" field: "iam_principal" } ==> increment counter /iam/policy/backend_debug_access_count {iam_principal=[value of IAMContext.principal]}
-                  #
-                  # At this time we do not support multiple field names (though this may be supported in the future).
+                  # Examples: counter { metric: "/debug_access_count" field: "iam_principal" } ==&gt; increment counter /iam/policy/debug_access_count {iam_principal=[value of IAMContext.principal]}
                 "field": "A String", # The field value to attribute.
+                "customFields": [ # Custom fields.
+                  { # Custom fields. These can be used to create a counter with arbitrary field/value pairs. See: go/rpcsp-custom-fields.
+                    "name": "A String", # Name is the field name.
+                    "value": "A String", # Value is the field value. It is important that in contrast to the CounterOptions.field, the value here is a constant that is not derived from the IAMContext.
+                  },
+                ],
                 "metric": "A String", # The metric to update.
               },
               "dataAccess": { # Write a Data Access (Gin) log # Data access options.
-                "logMode": "A String", # Whether Gin logging should happen in a fail-closed manner at the caller. This is relevant only in the LocalIAM implementation, for now.
+                "logMode": "A String", # Whether Gin logging should happen in a fail-closed manner at the caller. This is currently supported in the LocalIAM implementation, Stubby C++, and Stubby Java. For Apps Framework, see go/af-audit-logging#failclosed. TODO(b/77591626): Add support for Stubby Go. TODO(b/129671387): Add support for Scaffolding.
               },
               "cloudAudit": { # Write a Cloud Audit log # Cloud audit options.
                 "logName": "A String", # The log_name to populate in the Cloud Audit Record.
@@ -376,11 +419,21 @@
           "description": "A String", # Human-readable description of the rule.
         },
       ],
-      "version": 42, # Deprecated.
+      "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.
       "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 read-modify-write cycle to perform policy updates in order to avoid race conditions: An `etag` is returned in the response to `getIamPolicy`, and systems are expected to put that etag in the request to `setIamPolicy` to ensure that their change will be applied to the same version of the policy.
           #
-          # If no `etag` is provided in the call to `setIamPolicy`, then the existing policy is overwritten blindly.
-      "bindings": [ # Associates a list of `members` to a `role`. `bindings` with no members will result in an error.
+          # **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.
+      "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:
@@ -389,7 +442,7 @@
               #
               # * `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` .
+              # * `user:{emailid}`: An email address that represents a specific Google account. For example, `alice@example.com` .
               #
               #
               #
@@ -397,20 +450,40 @@
               #
               # * `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 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.
+          "condition": { # Represents a textual expression in the Common Expression Language (CEL) syntax. CEL is a C-like expression language. The syntax and semantics of CEL are documented at https://github.com/google/cel-spec. # 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"
-            "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.
+              # 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.
+            "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.
             "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.
-            "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.
-            "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.
+            "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.
+            "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.
           },
         },
       ],
@@ -425,7 +498,7 @@
             #
             # * `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` .
+            # * `user:{emailid}`: An email address that represents a specific Google account. For example, `alice@example.com` .
             #
             #
             #
@@ -433,20 +506,40 @@
             #
             # * `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 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.
+        "condition": { # Represents a textual expression in the Common Expression Language (CEL) syntax. CEL is a C-like expression language. The syntax and semantics of CEL are documented at https://github.com/google/cel-spec. # 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"
-          "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.
+            # 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.
+          "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.
           "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.
-          "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.
-          "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.
+          "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.
+          "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.
         },
       },
     ],
@@ -457,23 +550,23 @@
 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.
       #
-      # { "bindings": [ { "role": "roles/owner", "members": [ "user:mike@example.com", "group:admins@example.com", "domain:google.com", "serviceAccount:my-other-app@appspot.gserviceaccount.com" ] }, { "role": "roles/viewer", "members": ["user:sean@example.com"] } ] }
+      # **JSON example:**
       #
-      # **YAML Example**
+      # { "bindings": [ { "role": "roles/resourcemanager.organizationAdmin", "members": [ "user:mike@example.com", "group:admins@example.com", "domain:google.com", "serviceAccount:my-project-id@appspot.gserviceaccount.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 }
       #
-      # bindings: - members: - user:mike@example.com - group:admins@example.com - domain:google.com - serviceAccount:my-other-app@appspot.gserviceaccount.com role: roles/owner - members: - user:sean@example.com role: roles/viewer
+      # **YAML example:**
       #
+      # bindings: - members: - user:mike@example.com - group:admins@example.com - domain:google.com - serviceAccount:my-project-id@appspot.gserviceaccount.com role: roles/resourcemanager.organizationAdmin - members: - 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).
+      # For a description of IAM and its features, see the [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 identities, if any, are exempted from logging. An AuditConfig must have one or more AuditLogConfigs.
           #
@@ -481,21 +574,22 @@
           #
           # Example Policy with multiple AuditConfigs:
           #
-          # { "audit_configs": [ { "service": "allServices" "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:foo@gmail.com" ] }, { "log_type": "DATA_WRITE", }, { "log_type": "ADMIN_READ", } ] }, { "service": "fooservice.googleapis.com" "audit_log_configs": [ { "log_type": "DATA_READ", }, { "log_type": "DATA_WRITE", "exempted_members": [ "user:bar@gmail.com" ] } ] } ] }
+          # { "audit_configs": [ { "service": "allServices" "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:jose@example.com" ] }, { "log_type": "DATA_WRITE", }, { "log_type": "ADMIN_READ", } ] }, { "service": "sampleservice.googleapis.com" "audit_log_configs": [ { "log_type": "DATA_READ", }, { "log_type": "DATA_WRITE", "exempted_members": [ "user:aliya@example.com" ] } ] } ] }
           #
-          # 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.
         "exemptedMembers": [
           "A String",
         ],
         "auditLogConfigs": [ # The configuration for logging of each type of permission.
           { # Provides the configuration for logging a type of permissions. Example:
               #
-              # { "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:foo@gmail.com" ] }, { "log_type": "DATA_WRITE", } ] }
+              # { "audit_log_configs": [ { "log_type": "DATA_READ", "exempted_members": [ "user:jose@example.com" ] }, { "log_type": "DATA_WRITE", } ] }
               #
-              # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting foo@gmail.com from DATA_READ logging.
+              # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting 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][].
               "A String",
             ],
+            "ignoreChildExemptions": True or False,
             "logType": "A String", # The log type that this config enables.
           },
         ],
@@ -514,14 +608,18 @@
                 #
                 # Supported field names: - "authority", which is "[token]" if IAMContext.token is present, otherwise the value of IAMContext.authority_selector if present, and otherwise a representation of IAMContext.principal; or - "iam_principal", a representation of IAMContext.principal even if a token or authority selector is present; or - "" (empty string), resulting in a counter with no fields.
                 #
-                # Examples: counter { metric: "/debug_access_count" field: "iam_principal" } ==> increment counter /iam/policy/backend_debug_access_count {iam_principal=[value of IAMContext.principal]}
-                #
-                # At this time we do not support multiple field names (though this may be supported in the future).
+                # Examples: counter { metric: "/debug_access_count" field: "iam_principal" } ==&gt; increment counter /iam/policy/debug_access_count {iam_principal=[value of IAMContext.principal]}
               "field": "A String", # The field value to attribute.
+              "customFields": [ # Custom fields.
+                { # Custom fields. These can be used to create a counter with arbitrary field/value pairs. See: go/rpcsp-custom-fields.
+                  "name": "A String", # Name is the field name.
+                  "value": "A String", # Value is the field value. It is important that in contrast to the CounterOptions.field, the value here is a constant that is not derived from the IAMContext.
+                },
+              ],
               "metric": "A String", # The metric to update.
             },
             "dataAccess": { # Write a Data Access (Gin) log # Data access options.
-              "logMode": "A String", # Whether Gin logging should happen in a fail-closed manner at the caller. This is relevant only in the LocalIAM implementation, for now.
+              "logMode": "A String", # Whether Gin logging should happen in a fail-closed manner at the caller. This is currently supported in the LocalIAM implementation, Stubby C++, and Stubby Java. For Apps Framework, see go/af-audit-logging#failclosed. TODO(b/77591626): Add support for Stubby Go. TODO(b/129671387): Add support for Scaffolding.
             },
             "cloudAudit": { # Write a Cloud Audit log # Cloud audit options.
               "logName": "A String", # The log_name to populate in the Cloud Audit Record.
@@ -555,11 +653,21 @@
         "description": "A String", # Human-readable description of the rule.
       },
     ],
-    "version": 42, # Deprecated.
+    "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.
     "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 read-modify-write cycle to perform policy updates in order to avoid race conditions: An `etag` is returned in the response to `getIamPolicy`, and systems are expected to put that etag in the request to `setIamPolicy` to ensure that their change will be applied to the same version of the policy.
         #
-        # If no `etag` is provided in the call to `setIamPolicy`, then the existing policy is overwritten blindly.
-    "bindings": [ # Associates a list of `members` to a `role`. `bindings` with no members will result in an error.
+        # **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.
+    "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:
@@ -568,7 +676,7 @@
             #
             # * `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` .
+            # * `user:{emailid}`: An email address that represents a specific Google account. For example, `alice@example.com` .
             #
             #
             #
@@ -576,20 +684,40 @@
             #
             # * `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 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.
+        "condition": { # Represents a textual expression in the Common Expression Language (CEL) syntax. CEL is a C-like expression language. The syntax and semantics of CEL are documented at https://github.com/google/cel-spec. # 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"
-          "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.
+            # 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.
+          "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.
           "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.
-          "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.
-          "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.
+          "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.
+          "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.
         },
       },
     ],
@@ -598,13 +726,13 @@
 </div>
 
 <div class="method">
-    <code class="details" id="testIamPermissions">testIamPermissions(project, resource, body)</code>
-  <pre>Returns permissions that a caller has on the specified resource.
+    <code class="details" id="testIamPermissions">testIamPermissions(project, resource, body=None)</code>
+  <pre>Returns permissions that a caller has on the specified resource.  Caution This resource is intended for use only by third-party partners who are creating Cloud Marketplace images.
 
 Args:
   project: string, Project ID for this request. (required)
   resource: string, Name or id of the resource for this request. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 {