@Override
 public void messageArrived(Message<Dtos.UserDto> message) {
   if (message instanceof UserAddedMessage) {
     usersList.addNewItem(message.getPayload());
   } else if (message instanceof UserDeletedMessage) {
     usersList.removeItem(message.getPayload());
   } else if (message instanceof UserEditedMessage) {
     usersList.refresh(message.getPayload());
   }
 }