public function getHeaderCss(Vtiger_Request $request) { $headerCssInstances = parent::getHeaderCss($request); $cssFileNames = array('~/libraries/dhtmlxGantt/skins/dhtmlxgantt_broadway.css'); $cssInstances = $this->checkAndConvertCssStyles($cssFileNames); $headerCssInstances = array_merge($headerCssInstances, $cssInstances); return $headerCssInstances; }