/**
 * @license
 * Copyright Elegante All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://elegante.dev/license
 */
import { Subscription } from 'rxjs';
export declare function publish<T = void>(key: string, value?: T): void;
export declare function subscribe<T = void>(key: string, handler: (arg: T) => void): Subscription;
export declare function unsubscribe(key: string): void;