Function start

github-actions/browserstack/set-browserstack-env.js:1477–1481

()

        return new ReadableStream(
          {
            start() {
              return __async(this, null, function* () {
                iterator = iterable[Symbol.asyncIterator]();
              });
            },
            pull(controller) {
              return __async(this, null, function* () {
                const { done, value } = yield iterator.next();