Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
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+
+<h1><a href="cloudidentity_v1.html">Cloud Identity API</a> . <a href="cloudidentity_v1.groups.html">groups</a> . <a href="cloudidentity_v1.groups.memberships.html">memberships</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#create">create(parent, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Creates a Membership.</p>
+<p class="toc_element">
+  <code><a href="#delete">delete(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Deletes a Membership.</p>
+<p class="toc_element">
+  <code><a href="#get">get(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Retrieves a Membership.</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">List Memberships within a Group.</p>
+<p class="toc_element">
+  <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
+<p class="firstline">Retrieves the next page of results.</p>
+<p class="toc_element">
+  <code><a href="#lookup">lookup(parent, memberKey_namespace=None, memberKey_id=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Looks up [resource</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="create">create(parent, body, x__xgafv=None)</code>
+  <pre>Creates a Membership.
+
+Args:
+  parent: string, [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+Group to create Membership within. Format: `groups/{group_id}`, where
+`group_id` is the unique ID assigned to the Group. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Resource representing a Membership within a Group
+    "updateTime": "A String", # Last updated timestamp of the Membership. Output only.
+    "preferredMemberKey": { # An EntityKey uniquely identifies an Entity. Namespaces are used to provide # EntityKey of the entity to be added as the member. Must be set while
+        # creating a Membership, read-only afterwards.
+        # 
+        # Currently allowed entity types: `Users`, `Groups`.
+        # isolation for IDs. A single ID can be reused across namespaces but the
+        # combination of a namespace and an ID must be unique.
+      "namespace": "A String", # Namespaces provide isolation for IDs, so an ID only needs to be unique
+          # within its namespace.
+          #
+          # Namespaces are currently only created as part of IdentitySource creation
+          # from Admin Console. A namespace `"identitysources/{identity_source_id}"` is
+          # created corresponding to every Identity Source `identity_source_id`.
+      "id": "A String", # The ID of the entity within the given namespace. The ID must be unique
+          # within its namespace.
+    },
+    "createTime": "A String", # Creation timestamp of the Membership. Output only.
+    "roles": [ # Roles for a member within the Group.
+        # 
+        # Currently supported MembershipRoles: `"MEMBER"`.
+      { # Resource representing a role within a Membership.
+        "name": "A String", # MembershipRole in string format.
+            #
+            # Currently supported MembershipRoles: `"MEMBER"`.
+      },
+    ],
+    "name": "A String", # [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+        # Membership in the format: `groups/{group_id}/memberships/{member_id}`,
+        # where group_id is the unique ID assigned to the Group to which Membership
+        # belongs to, and member_id is the unique ID assigned to the member
+        # 
+        # Must be left blank while creating a Membership.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
+        # different programming environments, including REST APIs and RPC APIs. It is
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
+        #
+        # You can find out more about this error model and how to work with it in the
+        # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If `true`, the operation is completed, and either `error` or `response` is
+        # available.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="delete">delete(name, x__xgafv=None)</code>
+  <pre>Deletes a Membership.
+
+Args:
+  name: string, [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+Membership to be deleted.
+
+Format: `groups/{group_id}/memberships/{member_id}`, where `group_id` is
+the unique ID assigned to the Group to which Membership belongs to, and
+member_id is the unique ID assigned to the member. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "error": { # The `Status` type defines a logical error model that is suitable for # The error result of the operation in case of failure or cancellation.
+        # different programming environments, including REST APIs and RPC APIs. It is
+        # used by [gRPC](https://github.com/grpc). Each `Status` message contains
+        # three pieces of data: error code, error message, and error details.
+        #
+        # You can find out more about this error model and how to work with it in the
+        # [API Design Guide](https://cloud.google.com/apis/design/errors).
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There is a common set of
+          # message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If `true`, the operation is completed, and either `error` or `response` is
+        # available.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should be a resource name ending with `operations/{unique_id}`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="get">get(name, x__xgafv=None)</code>
+  <pre>Retrieves a Membership.
+
+Args:
+  name: string, [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+Membership to be retrieved.
+
+Format: `groups/{group_id}/memberships/{member_id}`, where `group_id` is
+the unique id assigned to the Group to which Membership belongs to, and
+`member_id` is the unique ID assigned to the member. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Resource representing a Membership within a Group
+      "updateTime": "A String", # Last updated timestamp of the Membership. Output only.
+      "preferredMemberKey": { # An EntityKey uniquely identifies an Entity. Namespaces are used to provide # EntityKey of the entity to be added as the member. Must be set while
+          # creating a Membership, read-only afterwards.
+          #
+          # Currently allowed entity types: `Users`, `Groups`.
+          # isolation for IDs. A single ID can be reused across namespaces but the
+          # combination of a namespace and an ID must be unique.
+        "namespace": "A String", # Namespaces provide isolation for IDs, so an ID only needs to be unique
+            # within its namespace.
+            #
+            # Namespaces are currently only created as part of IdentitySource creation
+            # from Admin Console. A namespace `"identitysources/{identity_source_id}"` is
+            # created corresponding to every Identity Source `identity_source_id`.
+        "id": "A String", # The ID of the entity within the given namespace. The ID must be unique
+            # within its namespace.
+      },
+      "createTime": "A String", # Creation timestamp of the Membership. Output only.
+      "roles": [ # Roles for a member within the Group.
+          #
+          # Currently supported MembershipRoles: `"MEMBER"`.
+        { # Resource representing a role within a Membership.
+          "name": "A String", # MembershipRole in string format.
+              #
+              # Currently supported MembershipRoles: `"MEMBER"`.
+        },
+      ],
+      "name": "A String", # [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+          # Membership in the format: `groups/{group_id}/memberships/{member_id}`,
+          # where group_id is the unique ID assigned to the Group to which Membership
+          # belongs to, and member_id is the unique ID assigned to the member
+          #
+          # Must be left blank while creating a Membership.
+    }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(parent, pageToken=None, x__xgafv=None, pageSize=None, view=None)</code>
+  <pre>List Memberships within a Group.
+
+Args:
+  parent: string, [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+Group to list Memberships within.
+
+Format: `groups/{group_id}`, where `group_id` is the unique ID assigned to
+the Group. (required)
+  pageToken: string, The next_page_token value returned from a previous list request, if any.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageSize: integer, The default page size is 200 (max 1000) for the BASIC view, and 50
+(max 500) for the FULL view.
+  view: string, Membership resource view to be returned. Defaults to View.BASIC.
+
+Returns:
+  An object of the form:
+
+    {
+    "memberships": [ # List of Memberships.
+      { # Resource representing a Membership within a Group
+          "updateTime": "A String", # Last updated timestamp of the Membership. Output only.
+          "preferredMemberKey": { # An EntityKey uniquely identifies an Entity. Namespaces are used to provide # EntityKey of the entity to be added as the member. Must be set while
+              # creating a Membership, read-only afterwards.
+              #
+              # Currently allowed entity types: `Users`, `Groups`.
+              # isolation for IDs. A single ID can be reused across namespaces but the
+              # combination of a namespace and an ID must be unique.
+            "namespace": "A String", # Namespaces provide isolation for IDs, so an ID only needs to be unique
+                # within its namespace.
+                #
+                # Namespaces are currently only created as part of IdentitySource creation
+                # from Admin Console. A namespace `"identitysources/{identity_source_id}"` is
+                # created corresponding to every Identity Source `identity_source_id`.
+            "id": "A String", # The ID of the entity within the given namespace. The ID must be unique
+                # within its namespace.
+          },
+          "createTime": "A String", # Creation timestamp of the Membership. Output only.
+          "roles": [ # Roles for a member within the Group.
+              #
+              # Currently supported MembershipRoles: `"MEMBER"`.
+            { # Resource representing a role within a Membership.
+              "name": "A String", # MembershipRole in string format.
+                  #
+                  # Currently supported MembershipRoles: `"MEMBER"`.
+            },
+          ],
+          "name": "A String", # [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+              # Membership in the format: `groups/{group_id}/memberships/{member_id}`,
+              # where group_id is the unique ID assigned to the Group to which Membership
+              # belongs to, and member_id is the unique ID assigned to the member
+              #
+              # Must be left blank while creating a Membership.
+        },
+    ],
+    "nextPageToken": "A String", # Token to retrieve the next page of results, or empty if there are no
+        # more results available for listing.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call 'execute()' on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+<div class="method">
+    <code class="details" id="lookup">lookup(parent, memberKey_namespace=None, memberKey_id=None, x__xgafv=None)</code>
+  <pre>Looks up [resource
+name](https://cloud.google.com/apis/design/resource_names) of a Membership
+within a Group by member's EntityKey.
+
+Args:
+  parent: string, [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+Group to lookup Membership within.
+
+Format: `groups/{group_id}`, where `group_id` is the unique ID assigned to
+the Group. (required)
+  memberKey_namespace: string, Namespaces provide isolation for IDs, so an ID only needs to be unique
+within its namespace.
+
+Namespaces are currently only created as part of IdentitySource creation
+from Admin Console. A namespace `"identitysources/{identity_source_id}"` is
+created corresponding to every Identity Source `identity_source_id`.
+  memberKey_id: string, The ID of the entity within the given namespace. The ID must be unique
+within its namespace.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    {
+    "name": "A String", # [Resource name](https://cloud.google.com/apis/design/resource_names) of the
+        # Membership being looked up.
+        #
+        # Format: `groups/{group_id}/memberships/{member_id}`, where `group_id` is
+        # the unique ID assigned to the Group to which Membership belongs to, and
+        # `member_id` is the unique ID assigned to the member.
+  }</pre>
+</div>
+
+</body></html>
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