/** * Defines that the field shall notify value changes * * @param eventBus the event bus that will be used to fire the value change events */ public void notifyChanges(final EventBus eventBus) { if (eventBus != null) { singleRelationBox.addValueChangeHandler( new ValueChangeHandler<String>() { @Override public void onValueChange(ValueChangeEvent<String> arg0) { eventBus.fireEvent(new FieldValueChangeEvent(ImogSingleRelationBox.this)); } }); } }