declare class Helper {
    /**
     * @return {string}
     */
    static projectRoot(): string;
    static addEventListener(emitter: any, eventName: any, handler: any): {
        emitter: any;
        eventName: any;
        handler: any;
    };
    static removeEventListeners(listeners: any): void;
    static promisify(nodeFunction: any): (...args: any[]) => Promise<any>;
}
/**
 * @param {*} value
 * @param {string=} message
 */
export function assert(value: any, message?: string | undefined): void;
export function isFunction(functionToCheck: any): boolean;
export function isString(obj: any): boolean;
export function isObject(obj: any): boolean;
export function isStrictObject(obj: any): boolean;
export function wait(time: any): Promise<any>;
export function commandlineArgs(): {};
export function xpath(s: any): string;
export let timeouts: any[];
export function waitUntil(condition: any, retryInterval: any, retryTimeout: any): Promise<void>;
export function handleUrlRedirection(url: any): any;
export function assertType(obj: any, condition?: (obj: any) => boolean, message?: string): void;
export const descEvent: any;
export { Helper as helper };