code: public JsHandlerRegistration addGeometryEditStartHandler(final GeometryEditStartHandler handler) {
  		org.geomajas.plugin.editing.client.event.GeometryEditStartHandler h;
  		h = new org.geomajas.plugin.editing.client.event.GeometryEditStartHandler() {
  
  			public void onGeometryEditStart(GeometryEditStartEvent event) {
  				handler.onGeometryEditStart(new org.geomajas.plugin.editing.jsapi.client.event.GeometryEditStartEvent(
  						event.getGeometry()));
  			}
  		};
  		return new JsHandlerRegistration(new HandlerRegistration[] { delegate.addGeometryEditStartHandler(h) });
  	}
docs: Register a {@link GeometryEditStartHandler} that catches events that signal the editing process has started.
  
  @param handler
  The {@link GeometryEditStartHandler} to add as listener.
  @return The registration of the handler.