You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: secret.rs
    path of file: ./repos/p2panda/p2panda-rs/src/secret_group/lts
    
    the code of the file until where you have to start completion: // SPDX-License-Identifier: AGPL-3.0-or-later

use openmls::group::GroupId;
use openmls_traits::OpenMlsCryptoProvider;
use tls_codec::{TlsByteVecU8, TlsDeserialize, TlsSerialize, TlsSize};

use crate::hash::Hash;
use crate::secret_group::lts::error::LongTermSecretError;
use crate::secret_group::lts::{
    aead, LongTermSecretCiphersuite, LongTermSecretCiphertext, LongTermSecretEpoch,
};

/// Long term 
    
    fn group_id_hash_encoding() {
        let group_instance_id = Hash::new_from_bytes(&[1, 2, 3]);

        let secret = LongTermSecret::new(
            group_instance_id.clone(),
            LongTermSecretCiphersuite::PANDA10_AES256GCM,
            LongTermSecretEpoch(0),
            vec![1, 2, 3].into(),
        );

        // Make sure the conversion between p2panda `Hash` and MLS `GroupId` works
        assert_eq!(
            group_instance_id.as_str(),
            secret.group_instance_id().unwrap().as_str()
        );
    }