code: public final void removePreferenceFragmentListener(
              @NonNull final PreferenceFragmentListener listener) {
          Condition.INSTANCE.ensureNotNull(listener, "The listener may not be null");
          preferenceFragmentListeners.remove(listener);
      }
docs: Removes a specific listener, which should not be notified, when the currently shown
  preference fragment has been changed, anymore.
  
  @param listener
  The listener, which should be removed, as an instance of the type {@link
  PreferenceFragmentListener}. The listener may not be null