declare global {
    interface PromiseConstructor {
        /**
         * Start promise after delaying.
         *
         * @param {number} millisecond
         * - a time for the delay
         *
         * @return {Promise<void>}
         * A void promise
         *
         * @example
         * Promise.delay(300)
         * // return a void promise after delay 300 ms
         */
        delay(millisecond: number): Promise<void>;
    }
}
export {};