IOffice droppableOffice = store.getOffice(event.getHttpRequest().getParameter(OFFICE_ID));
if (! droppableOffice.getEmployees().contains(draggedEmployee)) {
BindStatusHelper helper = new BindStatusHelper("command.employees");
ListItem item = new ListItem(new SimpleText(draggedEmployee.getFirstname() + " " + draggedEmployee.getSurname()));
InputField hidden = new InputField(helper.getStatusExpression(), draggedEmployee.getMatriculationCode(), InputField.InputType.HIDDEN);
AppendContentAction appendAction = new AppendContentAction("employees", new LinkedList<Component>(Arrays.asList(item, hidden)));
AjaxResponse response = new AjaxResponseImpl();