public function addItem($text,
        PHPRtfLite_Font $font = null,
        PHPRtfLite_ParFormat $parFormat = null,
        $convertTagsToRtf = true
    ) {
        if ($font === null) {
            $font = $this->_font;
        }
        if ($parFormat === null) {
            $parFormat = $this->_parFormat;
        }

        $element = new PHPRtfLite_Element($this->_rtf, $text, $font, $parFormat);
        if ($convertTagsToRtf) {
            $element->setConvertTagsToRtf();
        }
        $this->_items[] = $element;

        return $this;
    }