/**
  * Flowのモジュール
  * @param Flow $flow
  */
 public function before_flow_handle(Flow $flow)
 {
     if (!$flow->is_post()) {
         $flow->vars("_onetimeticket", uniqid("") . mt_rand());
         $flow->sessions("_onetimeticket", $flow->in_vars("_onetimeticket"));
     }
 }