export interface PubSub {
    on(type: string, handler: (...args: unknown[]) => unknown): void;
    off(type?: string, handler?: (...args: unknown[]) => unknown): void;
    emit(type: string, ...payload: any[]): void;
    once(type: string, handler: (...args: unknown[]) => unknown): void;
}
export declare function createPubSub(): PubSub;
export declare const pubSub: PubSub;