Method add

out/cli.cjs:61750–61757

(request3)

          responseObject[kState] = response;
          responseObject[kState].body = body;
          responseObject[kHeaders][kHeadersList] = response.headersList;
          responseObject[kHeaders][kGuard] = "immutable";
          responseList.push(responseObject);
        }
        return Object.freeze(responseList);
      }
      async add(request3) {
        webidl.brandCheck(this, _Cache);
        webidl.argumentLengthCheck(arguments, 1, { header: "Cache.add" });
        request3 = webidl.converters.RequestInfo(request3);
        const requests = [request3];