Function isCustomIterable

lib/internal/fs/promises.js:2114–2116

(obj)

}

function isCustomIterable(obj) {
  return isIterable(obj) && !isArrayBufferView(obj) && typeof obj !== 'string';
}

async function appendFile(path, data, options) {
  options = getOptions(options, { encoding: 'utf8', mode: 0o666, flag: 'a' });