/**
 * Races a promise against a timeout, throwing a {@link TimeoutError} if the
 * timeout expires first. The timer is always cleaned up regardless of outcome.
 *
 * @param promise - The promise to race against the timeout.
 * @param timeoutMs - The timeout duration in milliseconds.
 * @param makeErrorMessage - A function that returns the error message for the TimeoutError.
 * @returns The resolved value of the promise if it settles before the timeout.
 */
export declare function raceWithTimeout<T>(promise: Promise<T>, timeoutMs: number, makeErrorMessage: () => string): Promise<T>;