export declare class Result<T> {
    isSuccess: boolean;
    private data;
    message: string | undefined;
    errorCode: number | undefined;
    constructor(isSuccess: boolean, message?: string, value?: T, errorCode?: number);
    getValue(): T;
    static ok<U>(value: U, message?: string): Result<U>;
    static fail<U>(message?: string, errorCode?: number): Result<U>;
}