import type { BitBaseEvent } from './bit-base-event';
export declare class PubsubMain {
    private topicMap;
    private createOrGetTopic;
    sub(topicUUID: any, callback: any): void;
    pub(topicUUID: any, event: BitBaseEvent<any>): void;
    unsubscribeAll(topicId: string): void;
    static runtime: import("@teambit/harmony").RuntimeDefinition;
    static provider(): Promise<PubsubMain>;
}