protected void initEventBehaviours(EditToolConfigurationHelper helper) {
helper.add(new DrawCreateVertexSnapAreaBehaviour());
// helper.add(new DrawSnapAreaBehaviour());
helper.add(new SetReferenceFeatureBehaviour(parallelContext));
helper.add(new SetInitialPointEventBehaviour(parallelContext));
helper.add(new SetSnapSizeBehaviour());
helper.add(new AcceptOnDoubleClickBehaviour());