/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * A hook to manage a state value that automatically resets to null after a duration.
 * Useful for transient UI messages, hints, or warnings.
 */
export declare function useTimedMessage<T>(durationMs: number): readonly [T | null, (msg: T | null) => void];