cfiFromRange(range, ignoreClass) {
    return new _epubcfi__WEBPACK_IMPORTED_MODULE_2__[/* default */ "a"](range, this.cfiBase, ignoreClass).toString();
  }
Get an EpubCFI from a Dom Range
@param {Range} range
@param {string} [ignoreClass]
@returns {EpubCFI} cfi