patch method
Update backup with full spec.
request - The metadata request object.
Request parameters:
name - Identifier. The resource name of the backup. Format:
projects/{project_id}/locations/{location}/backupVaults/{backup_vault_id}/backups/{backup_id}.
Value must have pattern
^projects/\[^/\]+/locations/\[^/\]+/backupVaults/\[^/\]+/backups/\[^/\]+$.
updateMask - Required. Field mask is used to specify the fields to be
overwritten in the Backup resource to be updated. The fields specified in
the update_mask are relative to the resource, not the full request. A
field will be overwritten if it is in the mask. If the user does not
provide a mask then all fields will be overwritten.
$fields - Selector specifying which fields to include in a partial
response.
Completes with a Operation.
Completes with a commons.ApiRequestError if the API endpoint returned an error.
If the used http.Client completes with an error when making a REST call,
this method will complete with the same error.
Implementation
async.Future<Operation> patch(
  Backup request,
  core.String name, {
  core.String? updateMask,
  core.String? $fields,
}) async {
  final body_ = convert.json.encode(request);
  final queryParams_ = <core.String, core.List<core.String>>{
    if (updateMask != null) 'updateMask': [updateMask],
    if ($fields != null) 'fields': [$fields],
  };
  final url_ = 'v1/' + core.Uri.encodeFull('$name');
  final response_ = await _requester.request(
    url_,
    'PATCH',
    body: body_,
    queryParams: queryParams_,
  );
  return Operation.fromJson(response_ as core.Map<core.String, core.dynamic>);
}