import { Subscription } from 'rxjs';
export declare class EventBusService {
    private subject;
    on<T>(routingKey: string, callback: any): Subscription;
    emit<T>(event: Event<T>): void;
}
export declare class Event<T> {
    routingKey: string;
    payload?: T | undefined;
    constructor(routingKey: string, payload?: T | undefined);
}