import { ElementRef, Renderer } from '@angular/core';
export declare class NgxGalleryHelperService {
    private renderer;
    private swipeHandlers;
    constructor(renderer: Renderer);
    manageSwipe(status: boolean, element: ElementRef, id: string, nextHandler: Function, prevHandler: Function): void;
    validateUrl(url: string): string;
    getBackgroundUrl(image: string): string;
    private getSwipeHandlers(id);
    private removeSwipeHandlers(id);
}