Prado\Web\UI\WebControls\TStyleSheet::onPreRender PHP Method

    public function onPreRender($param)
    {
        $cs = $this->getPage()->getClientScript();
        $styles = preg_split('/,|\\s+/', $this->getPradoStyles());
        foreach ($styles as $style) {
            if (($style = trim($style)) !== '') {
                $cs->registerPradoStyle($style);
            }
        }
        if (($url = $this->getStyleSheetUrl()) !== '') {
            $cs->registerStyleSheetFile($url, $url, $this->getMediaType());
        }
    }