Interface InstanceStorageLike

interface InstanceStorageLike {
    delete(key: string, callback?: (error: null | Error) => void): void;
    getKey(
        index: number,
        callback: (error: null | Error, key: null | string) => void,
    ): void;
    getLength(callback: (error: null | Error, length: number) => void): void;
    read(
        key: string,
        callback: (error: null | Error, val: unknown) => void,
    ): void;
    write(
        key: string,
        val: unknown,
        callback?: (error: null | Error) => void,
    ): void;
}