import { IAnimationLoop, FrameCallback } from '../../interfaces/i-animation-loop';
export declare class AnimationLoop implements IAnimationLoop {
    private readonly subscribers;
    private rafId;
    /**
     * Arrow property ensures stable `this` binding for requestAnimationFrame.
     * This is THE only place isActive is computed — no subscriber-level short-circuit.
     */
    private readonly tick;
    subscribe(id: string, fn: FrameCallback): void;
    unsubscribe(id: string): void;
    start(): void;
    stop(): void;
}