protected function onRun(Session $ses, array $args)
 {
     $session = "UNKNOWN";
     foreach ((new \ReflectionClass(Session::class))->getConstants() as $name => $value) {
         if ($value === $ses->getSessionId()) {
             $session = $name;
             break;
         }
     }
     return TextFormat::AQUA . "You are in session " . $session . "({$ses->getSessionId()}";
 }