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const getDeferrableVariables = (requests, request, variables: Variables) => {
  const { argumentDependencies } = request;

  if (argumentDependencies.length === 0) {
    return variables;
  }

  return argumentDependencies.reduce((acc, ad) => {
    const { response } = requests[ad.fromRequestName];

    const variable = get(response.data, ad.fromRequestPath);

    // TODO - handle ifList, ifNull
    return {
      ...acc,
      [ad.name]: variable,
    };
  }, {});
};

const batchRequestQuery = async (
  request: RequestNode,
  variables: Variables,
  cacheConfig: CacheConfig,
  uploadables: ?UploadableMap,
  sink: Sink<ExecutePayload>,
) => {
  const requests = {};

  for (const r of request.requests) {
    const v = getDeferrableVariables(requests, r, variables);

    const response = await cacheHandler(r, v, cacheConfig, uploadables, sink, false);

    requests[r.name] = response;
  }

  sink.complete();
};