public function checkIfQuestionnaireExist($questionnaireId)
    {
        $sqlGetQuestionnaire = "
                            SELECT
                                *
                            FROM
                                `syskonf`.`modul_kwestionariusz`
                            WHERE
                                kwestionariusz_id = '" . Validate::form2db($questionnaireId) . "'
                            AND
                                konferencja_textid = '" . Validate::form2db($this->conferenceTextId) . "'";

        $this->db->Execute($sqlGetQuestionnaire);
        if ($this->db->affected_rows() > 0) {
            return true;
        }
        return false;

    }