public function RoleRevokePermission(AuthRoleRevokePermissionRequest $argument,
                                         $metadata = [], $options = [])
    {
        return $this->_simpleRequest('/etcdserverpb.Auth/RoleRevokePermission',
            $argument,
            ['\Etcdserverpb\AuthRoleRevokePermissionResponse', 'decode'],
            $metadata, $options);
    }