/**
* Display appropriate message if there's nothing to do.
* The submit button is also suppressed in this case (see alterForm()).
+ * @return array
*/
protected function getFormFields() {
$user = $this->getUser();
/**
* Suppress the submit button if there's nothing to do;
* provide additional message on it otherwise.
+ * @param HTMLForm $form
*/
protected function alterForm( HTMLForm $form ) {
if ( $this->getTokensList() ) {