Promise

    // async toFulfill
    /**
     *
     * @return {Promise<[(*|undefined), any, any, any, any, any, any, any, any, any]>}
     */
    this.fulfill = async () => {
        if(state && state.toFulfill){
            return Promise.all(state.toFulfill.map(name => {
                if (toFulfill[name]) {
                    return toFulfill[name]();
                }
                return Promise.resolve();
            }))
        }

        // return this // return default promise
    };

    this.fulfill1 = () => new Promise(r => {

        if(state && state.toFulfill){
            Promise.all(state.toFulfill.map(name => {
                if (toFulfill[name]) {
                    return toFulfill[name]();
                }
                return Promise.resolve();
            }))
                .then(() => {r()})
        } else {
            r()
        }
    });