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: serialize.rs
    path of file: ./repos/snarkVM/ledger/block/src/header
    
    the code of the file until where you have to start completion: // Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM 
    
    fn test_bincode() -> Result<()> {
        let rng = &mut TestRng::default();

        for expected in [crate::header::test_helpers::sample_block_header(rng)].into_iter() {
            // Serialize
            let expected_bytes = expected.to_bytes_le()?;
            let expected_bytes_with_size_encoding = bincode::serialize(&expected)?;
            assert_eq!(&expected_bytes[..], &expected_bytes_with_size_encoding[8..]);

            // Deserialize
            assert_eq!(expected, Header::read_le(&expected_bytes[..])?);
            assert_eq!(expected, bincode::deserialize(&expected_bytes_with_size_encoding[..])?);
        }
        Ok(())
    }