Element draggable = ctx.getDraggable();
final DraggableHandler dragHandler = DraggableHandler.getInstance(draggable);
DraggableOptions options = dragHandler.getOptions();
try {
trigger(new BeforeDragStartEvent(ctx), options.getOnBeforeDragStart(),
ctx);
} catch (UmbrellaException e) {
for (Throwable t : e.getCauses()) {
if (t instanceof StopDragException) {
return false;