@UiHandler ("loginButton")
protected void handleLoginButtonClick(final ClickEvent event) {
// FBLoginOptions loginOptions = sFBLoginOptionsEditorDriver.flush();
FBLoginOptions loginOptions = loginOptionsEditor.flush();
Log.info("Login options: " + loginOptions.toJSONString());
FBGWT.Auth.login(loginOptions, new AsyncCallback<FBAuthEventResponse>() {
@Override
public void onFailure(final Throwable caught) {
handleError("Error logging in", caught);