WorkbenchDragAndDropManager { public void makeDraggable(IsWidget draggable, IsWidget dragHandle) { this.dragController.makeDraggable(draggable.asWidget(), dragHandle.asWidget()); }  void makeDraggable(IsWidget draggable,
                              IsWidget dragHandle); void registerDropController(final WorkbenchPanelView owner,
                                       final DropController dropController); void unregisterDropController(final WorkbenchPanelView view); void unregisterDropControllers(); WorkbenchDragContext getWorkbenchContext(); void setWorkbenchContext(final WorkbenchDragContext workbenchContext);  }
@Test public void assertMakeDraggableDelegation() { wrapper.makeDraggable(mock(IsWidget.class), mock(IsWidget.class)); verify(dragController).makeDraggable(any(Widget.class), any(Widget.class)); }