Krucas\Notification\NotificationsBag::add PHP Method

    public function add($type, $message, $flash = true, $format = null)
    {
        if (!$this->typeIsAvailable($type)) {
            return $this;
        }
        if ($message instanceof \Krucas\Notification\Message) {
            $m = $message;
            $this->addInstance($m, $type, $flash, $format);
        } elseif ($message instanceof Closure) {
            $m = new Message($type, null, $flash, $format);
            call_user_func_array($message, [$m]);
            $this->addInstance($m, $type, $flash, $format);
        } else {
            $m = new Message($type, $message, $flash, $this->checkFormat($format, $type));
        }
        if (!$m->isFlash()) {
            $this->notifications->add($m);
            $this->fireEvent('added', $m);
        } else {
            $this->fireEvent('flash', $m);
        }
        return $this;
    }