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: batch.rs
    path of file: ./repos/zenoh/io/zenoh-transport/src/common
    
    the code of the file until where you have to start completion: //
// Copyright (c) 2023 ZettaScale Technology
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
//
// Contributors:
//   ZettaScale Zenoh Team, <zenoh@zettascale.tech>
//
use std::num::NonZeroUsize;
use zenoh_buffers::{
    buffer::Buffer,
    reader::{DidntRead, HasReader},
    writer::{DidntWrite, HasWriter, Writer},
    BBuf, ZBufReader, ZSlice, ZSliceBuffer,
};
use zenoh_codec::{
    transport::batch::{BatchError, Zenoh080Batch},
    RCode
    
    fn compress(&mut self, support: &mut BBuf) -> ZResult<Finalize> {
        // Write the initial bytes for the batch
        support.clear();
        Self::init(support, &self.config);

        // Compress the actual content
        let (_length, _header, payload) = Self::split(self.buffer.as_slice(), &self.config);
        let mut writer = support.writer();
        writer
            .with_slot(writer.remaining(), |b| {
                lz4_flex::block::compress_into(payload, b).unwrap_or(0)
            })
            .map_err(|_| zerror!("Compression error"))?;

        // Verify wether the resulting compressed data is smaller than the initial input
        if support.len() < self.buffer.len() {
            Ok(Finalize::Buffer)
        } else {
            // Keep the original uncompressed buffer and unset the compression flag from the header
            let (_l, h, _p) = Self::split_mut(self.buffer.as_mut_slice(), &self.config);
            let h = h.first_mut().ok_or_else(|| zerror!("Empty BatchHeader"))?;
            *h &= !BatchHeader::COMPRESSION;
            Ok(Finalize::Batch)
        }
    }