/**
  * @return DataGridFilterConfig
  */
 public function getDataGridFilterConfig()
 {
     if (empty($this->dataGridFilterConfig)) {
         $this->dataGridFilterConfig = $this->createDataGridFilterConfig();
         $this->dataGridFilterConfig->finish();
     }
     return $this->dataGridFilterConfig;
 }
 /**
  * @return DataGridFilterConfig
  */
 protected function createDataGridFilterConfig()
 {
     return DataGridFilterConfig::create($this->model);
 }