Prado\Web\UI\WebControls\TKeyboard::registerStyleSheet PHP Method

    protected function registerStyleSheet()
    {
        if (($url = $this->getCssUrl()) === '') {
            $url = $this->getApplication()->getAssetManager()->publishFilePath(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'assets' . DIRECTORY_SEPARATOR . 'keyboard.css');
        }
        $this->getPage()->getClientScript()->registerStyleSheetFile($url, $url);
    }