import { Predicate, Type } from '@angular/core';
import { Listener } from './listener';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class PublisherService {
    private static publisher$;
    private static registryItems;
    private readonly injector;
    static getInstance: () => PublisherService;
    static addListenerToRegistry(predicate: Predicate<any> | Predicate<any>[], listener: Type<Listener<any>>): void;
    static getPublisher(): Observable<any>;
    publish<E>(event: E): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<PublisherService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<PublisherService>;
}