export declare function validateFnr(value: string, { errorFnr, errorFnrLength, }: {
    errorFnr: string;
    errorFnrLength: string;
}): Error | undefined;
export declare function validateDnr(value: string, { errorDnr, errorDnrLength, }: {
    errorDnr: string;
    errorDnrLength: string;
}): Error | undefined;
export declare function validateDnrAndFnr(value: string, errorMessages: {
    errorFnr: string;
    errorFnrLength: string;
    errorDnr: string;
    errorDnrLength: string;
}): Error | undefined;