Function isNodeStream

lib/internal/streams/utils.js:68–78

(obj)

}

function isNodeStream(obj) {
  return (
    obj &&
    (
      obj._readableState ||
      obj._writableState ||
      (typeof obj.write === 'function' && typeof obj.on === 'function') ||
      (typeof obj.pipe === 'function' && typeof obj.on === 'function')
    )
  );
}

function isReadableStream(obj) {
  return !!(