@Test
public void registerAndUnregisterDropControllers() {
wrapper.registerDropController( workbenchPanelView, dropController );
assertEquals( wrapper.dropControllerMap.get( workbenchPanelView ), dropController );
WorkbenchPanelView workbenchPanelView2 = GWT.create( WorkbenchPanelView.class );
DropController dropController2 = GWT.create( DropController.class );
wrapper.registerDropController( workbenchPanelView2, dropController2 );
assertEquals( wrapper.dropControllerMap.get( workbenchPanelView2 ), dropController2 );