code: @SuppressWarnings("SynchronizationOnLocalVariableOrMethodParameter")
      public void unregisterCaller(Identification identification) {
          if(!callers.containsKey(identification)) return;
          callers.get(identification).localEvents = null;
          callers.remove(identification);
      }
docs: Unregister with the EventManager.
  
  Method is thread-safe.
  
  @param identification the Identification of the the instance