export declare class Context<T extends object | undefined> {
    private _current;
    private memory;
    constructor(context: T);
    get current(): T;
    /** This should not be used. Just here for initial development. Instead use
     * Context#with.
     */
    _setCurrent(context: T): T;
    with<A, B extends T>(context: B, fn: (context: B) => A): A;
    wrap<Passed extends T, Args extends unknown[], Return extends unknown>(context: Passed, fn: (...args: Args) => Return): (...args: Args) => Return;
}