import { InheritableEventEmitter } from '@akolos/event-emitter';
export interface LazyStopwatchEvents {
    started: [source: LazyStopwatch];
    stopped: [source: LazyStopwatch];
    sought: [from: number, source: LazyStopwatch];
    updated: [dt: number, source: LazyStopwatch];
}
export interface LazyStopwatchOpts {
    startTime?: number;
}
export declare class LazyStopwatch extends InheritableEventEmitter<LazyStopwatchEvents> {
    readonly startTime: number;
    protected _time: number;
    private _stopped;
    private timeOfLastUpdate;
    get time(): number;
    get stopped(): boolean;
    constructor(opts?: LazyStopwatchOpts);
    seek(time: number): this;
    update(now?: number): number;
    start(): this;
    stop(): this;
}