Grido\Components\Filters\Filter::getWrapperPrototype PHP Метод

    public function getWrapperPrototype()
    {
        if (!$this->wrapperPrototype) {
            $this->wrapperPrototype = \Nette\Utils\Html::el('th')->setClass(['grid-filter-' . $this->getName()]);
        }
        return $this->wrapperPrototype;
    }