@Override
public void setTarget(EditPart editPart) {
super.setTarget(editPart);
if (editPart instanceof TargetRefElementEditPart) {
TargetRefElementEditPart target = (TargetRefElementEditPart) editPart;
TargetRefElement targetElement = (TargetRefElement) ((View) target.getModel()).getElement();
getPrimaryShape().setOptionalLink(targetElement.isOptional());
}
}
