code: public void register() {
  		registrations.add(editService.addGeometryEditMoveHandler(this));
  		registrations.add(editService.addGeometryEditShapeChangedHandler(this));
  		registrations.add(editService.addGeometryEditTentativeMoveHandler(this));
  		registrations.add(editService.addGeometryEditChangeStateHandler(this));
  	}
docs: Register handlers. Activates this handler.