import { Observable } from 'rxjs';
import { GrowlMessage } from './growl-message';
import * as i0 from "@angular/core";
export declare class GrowlBrokerService {
    private _messageAddedSubject;
    get messageAddedSubject(): Observable<GrowlMessage>;
    addMessage(message: GrowlMessage): void;
    addWithType(type: string, content: string): void;
    addWithTypeAndTimeToDisplayInSeconds(type: string, content: string, timeToDisplayInSeconds: number): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<GrowlBrokerService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<GrowlBrokerService>;
}