public function CreateInstance(\Google\Cloud\Bigtable\Admin\V2\CreateInstanceRequest $argument,
      $metadata = [], $options = []) {
        return $this->_simpleRequest('/google.bigtable.admin.v2.BigtableInstanceAdmin/CreateInstance',
        $argument,
        ['\Google\LongRunning\Operation', 'decode'],
        $metadata, $options);
    }