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