private function fetchDataByUserFunc($c, $data, $column, $row, $header, $heightc) {
        if (!$header && is_callable($c['renderer'])) {
            $data = $c['renderer']($this, $data, $row, $column, $heightc);
        } elseif ($header && is_callable($c['headerRenderer'])) {
            $data = $c['headerRenderer']($this, $data, $row, $column, $heightc);
        }
        return $data;
    }