public function renderLabel($content, $class = '', $style = '')
    {
        $styleAttr = ($style) ? ' style="' . $style . '"' : '';
        $classes = ($class) ? ' ' . $class : '';
        $renderLabel = '';
        $renderLabel .= '<span class="fs-label' . $classes . '"' . $style . '>';
        $renderLabel .= $content;
        $renderLabel .= '</span>';
        return $renderLabel;
    }