public function pjaxBegin()
{
if ($this->enabledPjax) {
if (!$this->pjax) {
$this->_pjaxCreated = true;
$pjaxClassName = $this->pjaxClassName;
$this->pjax = $pjaxClassName::begin(ArrayHelper::merge(['id' => 'sx-pjax-grid-' . $this->id], $this->pjaxOptions));
}
}
}