export declare const randomString: (length?: number, withNumbers?: boolean) => string;
/**
 * Generates a random number between 0 and `max`
 *
 * @param {Number} max
 * @return {Number} generated random number
 */
export declare const randomNumber: (max: number) => number;
/**
 * Subtracts all objB keys from objA keys and returns the result.
 * Both objects should have identical keys with numeric values
 *
 * @param {Object} objA
 * @param {Object} objB
 * @return {Object} Object with the diffed values
 */
export declare const diffKeys: (objA: any, objB: any) => any;