Laravel，从刀片模板文件调用控制器方法

Question

Heey guys! I use Laravel 5.4, WAMP for localhost. I am struggling with the problem to call a Controller@methodName within my header.blade.php file, because I want to show in my header.blade.php file all notifications for the User. Normally I was getting all needed data with the help of routes in different pages. But for this case I need to call without using routes. Here is my code for my NotificationController:

class NotificationController extends Controller
{   
  public function getNotification(){
    $notifications = Notification::where('user_id',Auth::user()->id)->get();
    $unread=0;

    foreach($notifications as $notify){
        if($notify->seen==0)$unread++;
    }

    return ['notifications'=>$notifications, 'unread'=>$unread];
  }
}

And I should receive all these data in my header file. I have used: {{App::make("NotificationController")->getNotification()}} and {{NotificationController::getNotification() }} But it says Class NotificationController does not exist. Please heelp!