. I have a sorted of userPresenters in my MainPresenter SortedSet userPresenters = new TreeSet (); They are inserted into a USER_SLOT in the. So if we find a spot within GWTP (a central place for adding and removing widgets (might be setInSlot, with a custom presenter) we should be good. signal m_signal;. Presenters in GWTP have a concept of slots. If I have Presenter that has a presenterWidget added using setInSlot(), when the Presenter is unbind(), the presenterWidget's onUnbind() is. Calling either of these methods will. * * @param slot the new slot to add this {@code child} to. I have a child presenter (added to the parent in a slot) that fires Can EventBus call a separated Presenter (not a nested Presenter) in GWTP? ##Display a Popup Presenter The Popup Presenter skips the view's slot methods altogether. Any. Slots are basically placeholders So removing a child from the slot should also remove it from the collection. Remove a child from its parent and make it a child of the current presenter. Removing a popup presenter. You would now do this for libsigc++ sigc::slot<.