text: class AsyncPlugin {
      constructor(akyuu) {
          this.akyuu = akyuu;
          this.position = akyuu.PLUGIN_POS.BEFORE_CONTROLLER;
      }
  
      plug(callback) {
          const self = this;
          setTimeout(function() {
              self.akyuu.get("/async_plugin", function(req, resp) {
                  resp.succ("success-load-sync-plugin");
              });
              callback();
          }, 500);
      }
  }
  
  exports.create = function(akyuu, options) {
      return new AsyncPlugin(akyuu, options);
  };
  