function Autocallable() {

    let instance = {
        init() {
            window.addEventListener('message', function (e) {
                let head = "specialsnowball-save:";
                if (_.startsWith(e.data, head)) {
                    localStorage.setItem("pro__specialsnowball", e.data.substring(head.length))
                    main.open('保存交易', '/trade/tradeEdit?from=specialsnowball', { area: ['1260px', '100%'], scrollbar: false });
                }
            }, false);
        }
    };

    return instance;
}