/**
 * Returns a promise that resolves after the given number of milliseconds.
 *
 * Useful for inserting delays between asynchronous steps, backing off between
 * retries, or pacing polling loops.
 *
 * @param ms - The delay duration in milliseconds. Values `<= 0` resolve on the
 *   next event-loop tick. Non-integer values are coerced by {@link setTimeout}.
 * @returns A promise that resolves (with `undefined`) once the timer fires.
 *
 * @example
 * ```ts
 * console.log("before");
 * await sleep(1000);
 * console.log("one second later");
 * ```
 */
export declare function sleep(ms: number): Promise<unknown>;