import { TReferenceProps } from '../../..';
import { IStringProps, TStringValidatorResult } from '../_types';
export interface IIsEqualToProps {
    /**
     * The list of authorized values.
     */
    values: string[];
}
/**
 * Check if the string is equal to a list of values.
 */
export declare const isEqualTo: (props: TReferenceProps<IIsEqualToProps> & IStringProps) => TStringValidatorResult;