Inpsyde\MultilingualPress\Asset\AssetManager::enqueue PHP Method

    private function enqueue(callable $callback)
    {
        $enqueue_action = $this->get_enqueue_action();
        if (did_action($enqueue_action)) {
            add_action($enqueue_action, $callback);
        } else {
            call_user_func($callback);
        }
    }