dragHandler.initialize(draggable, event);
callPlugins(new StartCaller(ctx, dragHandler, event), options);
try {
trigger(new DragStartEvent(ctx), options.getOnDragStart(), ctx);
} catch (UmbrellaException e) {
for (Throwable t : e.getCauses()) {
if (t instanceof StopDragException) {
mouseStop(draggable, event);
return false;