import { Title } from '@angular/platform-browser';
import { PresentationService } from './presentation.service';
export declare class AdvancedTitleService {
    private readonly title;
    private readonly presentation;
    private lastReturnedUnset;
    private readonly original;
    constructor(title: Title, presentation: PresentationService);
    setTitle(newTitle: string): (() => void);
    prefixTitle(prefix: string, separator?: string): (() => void);
}