import React from "react";
import { Sub } from "..";
import { Player } from "../player";
export declare const EmpiricaContext: React.Context<Player | null>;
export declare const NSContext: React.Context<import("@empirica/tajriba").Maybe<string>>;
export declare const URLContext: React.Context<string>;
export declare const OnPlayerIDContext: React.Context<((playerID: string) => {}) | null>;
export declare type Store = {
    subscribe: (subscription: Sub) => () => void;
};
export declare const GlobalContext: React.Context<Store | null>;