if (di != null) {
String dropid = ureq.getParameter("v");
List accDrags = di.getAccepted();
for (Iterator it_accdrags = accDrags.iterator(); it_accdrags.hasNext();) {
Draggable dr = (Draggable) it_accdrags.next();
DragSource ds = dr.find(dropid);
if (ds != null) {
// found!
fireEvent(ureq, new DropEvent(ds, null));
return;
}