clearAttribute: AugmentedSubmittable<(collection: u32 | AnyNumber | Uint8Array, maybeItem: Option<u32> | null | Uint8Array | u32 | AnyNumber, namespace: PalletNftsAttributeNamespace | { Pallet: any } | { CollectionOwner: any } | { ItemOwner: any } | { Account: any } | string | Uint8Array, key: Bytes | string | Uint8Array) => SubmittableExtrinsic<ApiType>, [u32, Option<u32>, PalletNftsAttributeNamespace, Bytes]>;