docs: function (res, args) {
          var interc = args.interc;
          if (interc.removed) {
              // the interceptor was removed in the mean time, call the original callback directly
              return this.$callback(args.origCb, res);
          }
          var info = args.info;
          info.step = "Callback";
          info.callback = args.origCb;
          info.callbackResult = res;
          info.cancelDefault = false;
          info.returnValue = null;
          this.$callback(interc, info);
          if (info.cancelDefault) {
              return info.returnValue;
          }
          return this.$callback(args.origCb, info.callbackResult);
      }