import { langType } from '../tools';
import Validator from './Validator';
/**
 * A validator for a maximum value length.
 */
export default class MaxLength implements Validator<langType, [number]> {
    private readonly maxLength;
    readonly params: [number];
    /**
     * Create the validator.
     *
     * @param maxLength - The maximum allowed length.
     */
    constructor(maxLength: number);
    validate(value: string): '$shared$maxLength' | undefined;
}