/** * {@inheritdoc} */ protected function prepareConfig(array $config, array $parentConfig = []) { $config['options'] = array_merge($default = ['trans_domain' => 'grids'], isset($parentConfig['options']) ? array_intersect_key($parentConfig['options'], $default) : [], isset($config['options']) ? $config['options'] : []); return parent::prepareConfig($config, $parentConfig); }