method_exists($treeBuilder, 'getRootNode') root twig_escape_filter($this->env, $value, 'html_attr') [$possibleEventName => $controllerAction] \is_string($controllerAction) \is_string($controllerAction) \is_string($controllerActions) \is_string($possibleEventName) \is_string($possibleEventName) && \is_string($controllerAction) method_exists($event, 'isMainRequest') FigGenericLinkProvider FigLink $linkProvider $linkProvider $linkProvider $this->createLink('preload', $href) $this->createLink('preload', $href) Link|FigLink