import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
export interface IIsMongoIdProps {
}
/**
 * Check if the string is a valid hex-encoded representation of a [MongoDB ObjectId](http://docs.mongodb.org/manual/reference/object-id/).
 */
export declare const isMongoId: (props?: TReferenceProps<IIsMongoIdProps> & IStringProps) => TStringValidatorResult;