import { PerformanceTrackEvent, PerformanceTrackEventParams } from '../types/eventTracker';
type TimeDetail = Pick<PerformanceTrackEventParams, 'timeStart' | 'timeEnd' | 'duration'>;
export declare class Timer {
    timeByEvent: Record<string, TimeDetail>;
    start(event: PerformanceTrackEvent): void;
    end(event: PerformanceTrackEvent): TimeDetail;
}
declare const _default: Timer;
export default _default;
