Function isReadableStream

lib/internal/streams/utils.js:80–88

(obj)

}

function isReadableStream(obj) {
  return !!(
    obj &&
    !isNodeStream(obj) &&
    typeof obj.pipeThrough === 'function' &&
    typeof obj.getReader === 'function' &&
    typeof obj.cancel === 'function'
  );
}

function isWritableStream(obj) {
  return !!(