/// <reference types="validator" />
import _isNumeric from 'validator/lib/isNumeric';
import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
declare type TParameters = Parameters<typeof _isNumeric>;
export interface IIsNumericProps {
    options?: TParameters[1];
}
/**
 * Check if the string contains only numbers.
 */
export declare const isNumeric: (props?: TReferenceProps<IIsNumericProps> & IStringProps) => TStringValidatorResult;
export {};