code: @Api
  	public void unregisterHandler(EventType eventType) {
  
  		if (!jsHandlersMap.containsKey(eventType)) {
  			return;
  		}
  
  		HammerGwt.off(hammertime, eventType, (NativeHammmerHandler) jsHandlersMap.remove(eventType));
  	}
docs: Unregister Hammer Gwt handler.
  
  @param eventType {@link org.geomajas.hammergwt.client.event.EventType}
  
  @since 1.0.0