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: metadata.rs
    path of file: ./repos/Daft/src/daft-parquet/src
    
    the code of the file until where you have to start completion: use std::sync::Arc;

use daft_io::{IOClient, IOStatsRef};

pub use parquet2::metadata::{FileMetaData, RowGroupMetaData};
use parquet2::read::deserialize_metadata;
use snafu::ResultExt;

use crate::{Error, JoinSnafu, UnableToParseMetadataSnafu};

fn metadata_len(buffer: &[u8], len: usize) -> i32 {
    i32::from_le_bytes(buffer[l
    
    async fn test_parquet_metadata_from_s3() -> DaftResult<()> {
        let file = "s3://daft-public-data/test_fixtures/parquet-dev/mvp.parquet";
        let size = 9882;

        let mut io_config = IOConfig::default();
        io_config.s3.anonymous = true;
        let io_client = Arc::new(IOClient::new(io_config.into())?);

        let metadata = read_parquet_metadata(file, size, io_client.clone(), None).await?;
        assert_eq!(metadata.num_rows, 100);

        Ok(())
    }