Metabor\Statemachine\Command::update PHP Метод

    public function update(\SplSubject $subject)
    {
        if (!$subject instanceof EventInterface) {
            throw new \InvalidArgumentException('Command can only be attached to an event!');
        }
        if (method_exists($this, '__invoke')) {
            call_user_func_array($this, $subject->getInvokeArgs());
        } else {
            throw new \Exception('Command should have at least one __invoke method');
        }
    }