Method keys

src/mapml/utils/DOMTokenList.js:101–103

()

  //https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/keys
  keys() {
    return this.domtokenlist.keys();
  }

  //https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList/values
  values() {