code: public void removeDropPasteWorker(DropPasteWorkerInterface worker)
      {
          this.dropPasteWorkerSet.remove(worker);
          java.util.Iterator it = this.dropPasteWorkerSet.iterator();
          int newDefaultActions = 0;
          while (it.hasNext())
              newDefaultActions |= ((DropPasteWorkerInterface)it.next()).getAcceptableActions(defaultDropTarget.getComponent());
          defaultDropTarget.setDefaultActions(newDefaultActions);
      }
docs: Remove a DropPasteWorker from the helper.
  @param worker the worker that should be removed