export type AnimationCadence = 16 | 80;
type AnimationCallback = (now: number) => void;
export interface AnimationRegistration {
    unregister(): void;
}
export declare function registerAnimationCallback(callback: AnimationCallback, cadence?: AnimationCadence): AnimationRegistration;
export declare const __animationSchedulerTestHooks: {
    getActiveTimerCount(cadence?: AnimationCadence): number;
    getRegistrantCount(cadence?: AnimationCadence): number;
    getStartedTimerCount(cadence?: AnimationCadence): number;
    getSkippedTickCount(): number;
    getCongestionThresholdBytes(): number;
    setBufferedOutputBytesProbe(probe: (() => number | undefined) | undefined): void;
    reset(): void;
};
export {};