import type { ReactElement } from "react";
type Listener = () => void;
export interface Registration<T> {
    key: number;
    useBody: () => T;
    render: () => ReactElement;
}
export declare const registrations: Registration<unknown>[];
export declare function subscribeToRegistry(listener: Listener): () => void;
export declare function getRegistrySnapshot(): number;
export declare function singletonHook<T>(initialValue: T, useBody: () => T): () => T;
export {};