export declare const validateString: (value: any, { defaultValue, allowed, required, message, trim, empty, min, max, length, regex, not, only, nullAsUndefined }: {
    defaultValue: any;
    allowed: any;
    required: any;
    message: any;
    trim: any;
    empty: any;
    min: any;
    max: any;
    length: any;
    regex: any;
    not: any;
    only: any;
    nullAsUndefined: any;
}) => any;
export declare const validateStringSync: (value: any, { defaultValue, allowed, required, message, parse, trim, empty, min, max, length, regex, not, only, func, nullAsUndefined }: {
    defaultValue: any;
    allowed: any;
    required: any;
    message: any;
    parse: any;
    trim: any;
    empty: any;
    min: any;
    max: any;
    length: any;
    regex: any;
    not: any;
    only: any;
    func: any;
    nullAsUndefined: any;
}) => any;
export declare const validateStringAsync: (value: any, { defaultValue, allowed, required, message, trim, empty, min, max, length, regex, not, only, func, nullAsUndefined }: {
    defaultValue: any;
    allowed: any;
    required: any;
    message: any;
    trim: any;
    empty: any;
    min: any;
    max: any;
    length: any;
    regex: any;
    not: any;
    only: any;
    func: any;
    nullAsUndefined: any;
}) => Promise<any>;