collaboration UsePublisherSubscriber {
  cd {{ Point = .
	InterestedInPointChange = .
	Main = .
     }}
  classes
    {{ class Main {
         public static void main(String args[]) throws Exception {
         Point c = Point.parse(System.in);
         c.usedButNotDefined(ClassGraph);
         System.out.println("done");
         }  
       }
    }}
    {{ class Point {
	 void set(...) {}
       }
    }}
    {{ class InterestedInPointChange {
	 void public notifyChange() {}
       }
    }}
  subCollaborations
    collaboration PublisherSubscriber {
      cd {{ Publisher = Vector(Subscriber).
	    Subscriber = .
         }}
      interfaces 
        {{interface PublisherI {
    	     public void attach(Subscriber subsc);
    	     public void detach(Subscriber subsc);
    	     abstract void changeOp(...);
	     public void replaced_changeOp(... 
	       Method expected_changeOp, ...) {
		 expected_changeOp.invoke(thisObject, args);
		 for (int i=0; i<subscribers.size(); i++) {
		   ... newUpdate(thisObject); }
               }
        }}
      classes
        {{ class Publisher implements PublisherI {
	     }
           }
        }}
     }  
  adapters
    class_map 
      PublisherSubscriber.Publisher played_by {Point}
	with method_map signature {{void changeOp();}} played_by {set};
    class_map
      PublisherSubscriber.Subscriber played_by {InterestedInPointChange}
	with 
      implement 
        signature {{ void subUpdate(Publisher publ) }}
        body {{ notifyChange(); ...
             }}
}