protected function callback($callback, array $args = [])
    {
        if (isset($callback)) {
            if (is_callable($callback) && $callback instanceof \Closure) {
                // Set new object and append the callback with some data.
                $o = new \ArrayObject($args);
                $o->app = App::instance();
                $callback = $callback->bindTo($o);
            } elseif (is_string($callback) && strpos($callback, '@') !== false) {
                $fixcallback = explode('@', $callback, 2);
                $this->Controller = $fixcallback[0];

                if (is_callable(
                    $callback = [$fixcallback[0], (isset($fixcallback[1]) ? $fixcallback[1] : 'index')]
                )) {
                    $this->Method = $callback[1];
                } else {
                    throw new \Exception("Callable error on {$callback[0]} -> {$callback[1]} !");
                }
            }

            if (is_array($callback) && !is_object($callback[0])) {
                $callback[0] = new $callback[0];
            }

            if (isset($args[0]) && $args[0] == $this->fullArg) {
                array_shift($args);
            }

            // Finally, call the method.
            return call_user_func_array($callback, $args);
        }
        return false;
    }