goog.loadJs('common', () => { goog.provide('Mixly.File'); class File { static { this.showOpenFilePicker = async () => { return new Promise((resolve, reject) => { reject(); }); } this.showDirectoryPicker = async () => { return new Promise((resolve, reject) => { reject(); }); } this.showSaveFilePicker = async () => { return new Promise((resolve, reject) => { reject(); }); } } constructor() {} async readFile() { return new Promise((resolve, reject) => { reject(); }); } async writeFile(data) { return new Promise((resolve, reject) => { reject(); }); } } Mixly.File = File; });