Interface Env

interface Env {
    get(key: string): string | undefined;
    set(key: string, value?: string): void;
    delete(key: string): void;
    keys(): string[];
    onSet(fn: OnSetFn, ...filter: string[]): void;
    gets(...kparams: KeysParam): Result<Record<string, string>>;
    sets(...keys: EnvTuple): void;
}