export declare const MAX_TRACKED_ROOTS = 4000;
export declare const SWEEP_EVERY = 250;
export declare function capturedRoots(): readonly ShadowRoot[];
export declare function isCaptured(host: Element): boolean;
export declare function capturedRootOf(host: Element): ShadowRoot | null;
export declare function onShadowRoot(listener: (root: ShadowRoot) => void): () => void;
export declare function installShadowRegistry(): () => void;