/**
 * @typedef {import("../../casa").ErrorMessageConfig} ErrorMessageConfig
 * @access private
 */
/**
 * @typedef {object} RequiredConfigOptions
 * @property {ErrorMessageConfig} errorMsg Error message config
 */
/**
 * Test if value is present.
 *
 * Value is required. The following values will fail this rule: (all values that
 * satisfy `isEmpty()`) plus '\s'
 *
 * See {@link RequiredConfigOptions} for `make()` options.
 *
 * @memberof Validators
 * @augments ValidatorFactory
 */
export default class Required extends ValidatorFactory {
    name: string;
    validate(value: any, dataContext?: {}): ValidationError[];
    sanitise(value: any): string | (string | undefined)[] | {
        [k: string]: string | undefined;
    } | undefined;
}
export type ErrorMessageConfig = import("../../casa").ErrorMessageConfig;
export type RequiredConfigOptions = {
    /**
     * Error message config
     */
    errorMsg: ErrorMessageConfig;
};
import ValidatorFactory from "../ValidatorFactory.js";
import ValidationError from "../ValidationError.js";