/**
 * Wall-clock timestamps of the current load attempt's lifecycle events,
 * for the timing meta on telemetry and terminal errors. Only the first
 * occurrence per attempt is recorded so a duplicate signal doesn't
 * overwrite the timing of the event that actually drove the transition.
 */
export type AttemptTimings = {
    loadStartedAt: number | null;
    manifestReceivedAt: number | null;
    pageFinishedAt: number | null;
    responseCommittedAt: number | null;
    sdkReadyAt: number | null;
};
export declare const createEmptyAttemptTimings: () => AttemptTimings;