export declare class Result<T, E> {
    private readonly isOk;
    private readonly _value?;
    private readonly _error?;
    private constructor();
    static ok<T, E = never>(value: T): Result<T, E>;
    static err<T = never, E = unknown>(error: E): Result<T, E>;
    static void<E = never>(): Result<void, E>;
    unwrap(): T;
    unwrapErr(): E;
    is_ok(): boolean;
    is_err(): boolean;
}