/**
 * Races `operation` against a timer, rejecting if it doesn't settle within `ms`.
 *
 * Note: this does not cancel `operation` — it keeps running in the background.
 * That is intentional for the HAR teardown path: a bounded `context.close()`
 * returns control so Playwright's built-in context teardown can await the real
 * close within its own budget, rather than our override hogging the shared
 * teardown budget that native video/trace persistence depends on.
 */
export declare const withTimeout: <TResult>(operation: Promise<TResult>, ms: number) => Promise<TResult>;