protected function addViewEvent($view, $callback, $prefix = 'composing: ', $priority = null)
    {
        if ($callback instanceof Closure) {
            $this->addEventListener($prefix.$view, $callback, $priority);

            return $callback;
        } else if (is_string($callback)) {
            return $this->addClassEvent($view, $callback, $prefix, $priority);
        }
    }