cfiFromPercentage(percentage) {
    let loc;

    if (percentage > 1) {
      console.warn("Normalize cfiFromPercentage value to between 0 - 1");
    } // Make sure 1 goes to very end


    if (percentage >= 1) {
      let cfi = new epubcfi["a" /* default */](this._locations[this.total]);
      cfi.collapse();
      return cfi.toString();
    }

    loc = Math.ceil(this.total * percentage);
    return this.cfiFromLocation(loc);
  }
Get an EpubCFI from location percentage
@param {number} percentage
@return {EpubCFI} cfi