public function getElementPrototype()
{
if ($this->elementPrototype === NULL) {
$this->elementPrototype = Html::el('a')->setClass(['grid-action-' . $this->getName()])->setText($this->label);
}
if (isset($this->elementPrototype->class)) {
$this->elementPrototype->class = (array) $this->elementPrototype->class;
}
return $this->elementPrototype;
}