import { Title } from '@angular/platform-browser';
import { TranslateService } from './translate.service';
import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class TitleService {
    private title;
    private translate;
    private _titleKey;
    changed: Subject<{
        previousValue: string;
        currentValue: string;
    }>;
    constructor(title: Title, translate: TranslateService);
    getTitle(): string;
    setTitle(key: string): void;
    private onLanguageChanged;
    static ɵfac: i0.ɵɵFactoryDeclaration<TitleService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TitleService>;
}