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diff --git a/node_modules/workbox-streams/concatenateToResponse.mjs b/node_modules/workbox-streams/concatenateToResponse.mjs
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+/*
+ Copyright 2018 Google Inc. All Rights Reserved.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+import {createHeaders} from './utils/createHeaders.mjs';
+import {concatenate} from './concatenate.mjs';
+
+import './_version.mjs';
+
+/**
+ * Takes multiple source Promises, each of which could resolve to a Response, a
+ * ReadableStream, or a [BodyInit](https://fetch.spec.whatwg.org/#bodyinit),
+ * along with a
+ * [HeadersInit](https://fetch.spec.whatwg.org/#typedefdef-headersinit).
+ *
+ * Returns an object exposing a Response whose body consists of each individual
+ * stream's data returned in sequence, along with a Promise which signals when
+ * the stream is finished (useful for passing to a FetchEvent's waitUntil()).
+ *
+ * @param {Array<Promise<workbox.streams.StreamSource>>} sourcePromises
+ * @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,
+ * `'text/html'` will be used by default.
+ * @return {Object<{done: Promise, response: Response}>}
+ *
+ * @memberof workbox.streams
+ */
+function concatenateToResponse(sourcePromises, headersInit) {
+  const {done, stream} = concatenate(sourcePromises);
+
+  const headers = createHeaders(headersInit);
+  const response = new Response(stream, {headers});
+
+  return {done, response};
+}
+
+export {concatenateToResponse};