import { Props } from './types';
export declare const call: (fn: any) => any;
export declare const isNull: <T>(obj: T | null) => obj is null;
export declare function setImage(element: HTMLImageElement | HTMLDivElement, imagePath: string): void;
export declare function loadImage(imagePath: string): Promise<string>;
export declare function isImageElement(element: HTMLImageElement | HTMLDivElement): element is HTMLImageElement;
export declare function addCssClassName(element: HTMLImageElement | HTMLDivElement, cssClassName: string): void;
export declare function registerImageToLazyLoad(element: Element, metadata: Props): void;