yii\grid\Column::renderHeaderCell PHP Метод

    public function renderHeaderCell()
    {
        return Html::tag('th', $this->renderHeaderCellContent(), $this->headerOptions);
    }

 /**
  * @inheritdoc
  */
 protected function renderHeaderCellContent()
 {
     if ($this->label !== null) {
         return $this->label;
     }
     if ($this->attribute !== null) {
         $model = $this->grid->filterModel;
         return $model->getAttributeLabel($this->attribute);
     }
     return parent::renderHeaderCell();
 }