public static function heroUnit($heading, $content, $htmlOptions = array())
    {
        self::addCssClass('hero-unit', $htmlOptions);
        $headingOptions = TbArray::popValue('headingOptions', $htmlOptions, array());
        $output = self::openTag('div', $htmlOptions);
        $output .= self::tag('h1', $headingOptions, $heading);
        $output .= $content;
        $output .= '</div>';
        return $output;
    }