export declare const validateBoolean: (value: any, { defaultValue, allowed, required, message, parse, not, only, nullAsUndefined }: {
    defaultValue: any;
    allowed: any;
    required: any;
    message: any;
    parse: any;
    not: any;
    only: any;
    nullAsUndefined: any;
}) => any;
export declare const validateBooleanSync: (value: any, { defaultValue, allowed, required, message, func, parse, not, only, nullAsUndefined }: {
    defaultValue: any;
    allowed: any;
    required: any;
    message: any;
    func: any;
    parse: any;
    not: any;
    only: any;
    nullAsUndefined: any;
}) => any;
export declare const validateBooleanAsync: (value: any, { defaultValue, allowed, required, message, func, parse, not, only, nullAsUndefined }: {
    defaultValue: any;
    allowed: any;
    required: any;
    message: any;
    func: any;
    parse: any;
    not: any;
    only: any;
    nullAsUndefined: any;
}) => Promise<any>;