/// <reference types="validator" />
import _isEmpty from 'validator/lib/isEmpty';
import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
declare type TParameters = Parameters<typeof _isEmpty>;
export interface IIsEmptyProps {
    /**
     * Options is an object which defaults to `{ ignore_whitespace:false }`.
     */
    options?: TParameters[1];
}
/**
 * Check if the string has a length of zero.
 */
export declare const isEmpty: (props?: TReferenceProps<IIsEmptyProps> & IStringProps) => TStringValidatorResult;
export {};