public function followedByAction()
 {
     if (!isset($this->params['id'])) {
         return $this->renderString('id no presente');
     }
     // Todos los que siguen a este
     //$user = TUser::get($this->params['id']);
     $users = TUser::findReverse('following', $this->params['id']);
     return $this->renderString(print_r($users), true);
 }