export declare class CodeHelper {
    private static readonly UnknownCode;
    private static operationCodeDic;
    private static eventCodeDic;
    private static returnCodeDic;
    static getOperationCodeName(operationCode: number): string;
    static getEventCodeName(eventCode: number): string;
    static getReturnCodeName(returnCode: number): string;
    static init(): void;
    private static setOperationCodeDic;
    static addOperationCodeDic(operationCode: any): void;
    private static setEventCodeDic;
    static addEventCodeDic(eventCode: any): void;
    private static setReturnCodeDic;
    static addReturnCodeDic(returnCode: any): void;
    static getEventCodeDic(): {
        [k: number]: string;
    };
    static getReturnCodeDic(): {
        [k: number]: string;
    };
}