import { IFormatInputOptions, postgresDataTypes, IPgOutputType } from '../types';
interface IBooleanOptions {
    notUndef?: boolean;
    notEmpty?: boolean;
    pgType?: postgresDataTypes;
}
declare const _default: (options?: IBooleanOptions | undefined) => (value: any, privateOptions: IFormatInputOptions) => boolean | IPgOutputType | Error | null | undefined;
export default _default;