code: public JsHandlerRegistration addGeometryMergeStopHandler(final GeometryMergeStopHandler handler) {
  		org.geomajas.plugin.editing.client.merge.event.GeometryMergeStopHandler h;
  		h = new org.geomajas.plugin.editing.client.merge.event.GeometryMergeStopHandler() {
  
  			public void onGeometryMergingStop(GeometryMergeStopEvent event) {
  				org.geomajas.plugin.editing.jsapi.client.merge.event.GeometryMergeStopEvent e;
  				e = new org.geomajas.plugin.editing.jsapi.client.merge.event.GeometryMergeStopEvent();
  				handler.onGeometryMergeStop(e);
  			}
  		};
  		HandlerRegistration registration = delegate.addGeometryMergeStopHandler(h);
  		return new JsHandlerRegistration(new HandlerRegistration[] { registration });
  	}
docs: Register a {@link GeometryMergeStopHandler} to listen to events that signal the merging process has ended
  (either through stop or cancel).
  
  @param handler
  The {@link GeometryMergeStopHandler} to add as listener.
  @return The registration of the handler.