original_string: protected function getSummaryColumns()
      {
          $columns = [];
  
          $model = $this->getSampleModel();
          $columnName = $model->getLabelColumnName();
  
          if ($columnName != "") {
              $columns[] = $columnName;
          }
  
          return $columns;
      }
code: protected function getSummaryColumns()
      {
          $columns = [];
  
          $model = $this->getSampleModel();
          $columnName = $model->getLabelColumnName();
  
          if ($columnName != "") {
              $columns[] = $columnName;
          }
  
          return $columns;
      }
code_tokens: protected function getSummaryColumns ( ) { $ columns = [ ] ; $ model = $ this -> getSampleModel ( ) ; $ columnName = $ model -> getLabelColumnName ( ) ; if ( $ columnName != "" ) { $ columns [ ] = $ columnName ; } return $ columns ; }
docstring: Override to control the columns returned in HEAD requests
  
  @return string[]
docstring_tokens: Override to control the columns returned in HEAD requests