Pimcore\Model\Document\Listing\Dao::getTotalCount PHP Method

    public function getTotalCount()
    {
        $select = $this->getQuery([new \Zend_Db_Expr('COUNT(*)')]);
        $select->reset(\Zend_Db_Select::LIMIT_COUNT);
        $select = (string) $select;
        $amount = (int) $this->db->fetchOne($select, $this->model->getConditionVariables());
        return $amount;
    }