Create method of class from call

Hi!

I just start use PHPStorm as main IDE for develop, and i can't find any information about one usefull feature. For example i declare some class. After that i go to other class and call method of first class, that not exist yet. Here i think must be a feature that declare method of first class and drop my cursor inside this method. Here is example:

 <?php 

class User {} 

?> 
 
<? 
 
class Order {
     public function __construct(User $user) { 
          if (!$user->getName()) { // here i want do some magic and method getName declare in class User 
               throw new Exception('No order without user name'); 
          } 
     } 
} 
?>