export type TickCallback = (dt: number, elapsed: number) => void;
export declare class AnimationLoop {
    private rafId;
    private lastTime;
    private elapsed;
    private callbacks;
    private _paused;
    private _speedMultiplier;
    get paused(): boolean;
    get speedMultiplier(): number;
    add(cb: TickCallback): () => void;
    start(): void;
    stop(): void;
    pause(): void;
    resume(): void;
    setSpeed(multiplier: number): void;
    private tick;
    destroy(): void;
}
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