attribute: AugmentedQuery<ApiType, (arg1: u32 | AnyNumber | Uint8Array, arg2: Option<u32> | null | Uint8Array | u32 | AnyNumber, arg3: Bytes | string | Uint8Array) => Observable<Option<ITuple<[Bytes, u128]>>>, [u32, Option<u32>, Bytes]> & QueryableStorageEntry<ApiType, [u32, Option<u32>, Bytes]>;