public void deleteClicked() {
    if (!view.confirm("Really delete this entry? You cannot undo this change.")) {
      return;
    }
    requests
        .registrationRequest()
        .remove()
        .using(view.getValue())
        .fire(
            new Receiver<Void>() {

              public void onSuccess(Void ignore) {
                if (display == null) {
                  // This activity is dead
                  return;
                }
                // Go back to the previous place.
                placeController.goTo(getBackButtonPlace());
              }
            });
  }