function setHeaders$1 (res, headers) {
  if (!headers) {
    return
  }

  var keys = Object.keys(headers);
  for (var i = 0; i < keys.length; i++) {
    var key = keys[i];
    res.setHeader(key, headers[key]);
  }
}
Initialize a `SendStream` with the given `path`.

@param {Request} req
@param {String} path
@param {object} [options]
@private