code: public <T> void add(Class<T> eventClass, Listener<T> listener, int priority, ReferenceStrength strength) {
          add(eventClass, listener, HIDDEN_STATION, priority, strength);
      }
docs: Adds a {@link Listener} (with the given priority and strength ) to the hidden station listening for the given event class, hiding the station abstraction.
  
  @see EventStudio#add(Listener, String, int, ReferenceStrength)
  @see DefaultEventStudio#HIDDEN_STATION