/**
 * 核心异常类
 * ServiceUnavailableException
 * code 503
 * @author ranyunlong<549510622@qq.com>
 * license MIT
 */
import { HttpException, Properties } from "./HttpException";
/**
 * @code 503
 */
export declare class ServiceUnavailableException extends HttpException {
    constructor(properties?: Properties | boolean, error?: Properties, message?: string);
}