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