declare const _default: {
    random: (length: number, chars: string) => string;
    number: (length?: number) => string;
    lowerCase: (length?: number) => string;
    upperCase: (length?: number) => string;
    lowerUpperCase: (length?: number) => string;
    numberLowerCase: (length?: number) => string;
    numberUpperCase: (length?: number) => string;
    numberLowerUpperCase: (length?: number) => string;
    str: (length?: number) => string;
};
export default _default;