/**
* Calculates the total number of data items.
*
* @return int the total number of data items.
*/
protected function calculateTotalItemCount()
{
// Count all
$total = $this->collection->count();
// Make a pagination
$pagination = $this->getPagination();
// Set total item in pagination
$pagination->setItemCount($total);
// Set a new pagination instance
$this->setPagination($pagination);
return $total;
}
