public function beforeLoadDataTable()
{
$this->requestConfig->addPropertiesThatShouldBeAvailableClientSide(array('filter_limit', 'filter_offset', 'filter_sort_column', 'filter_sort_order'));
if (!is_numeric($this->requestConfig->filter_limit)) {
$this->requestConfig->filter_limit = 20;
}
$this->requestConfig->disable_generic_filters = true;
$this->requestConfig->filter_sort_column = false;
}