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: message.rs
    path of file: ./repos/cuprate/net/levin/src
    
    the code of the file until where you have to start completion: //! Levin Messages
//!
//! This module contains the [`LevinMessage`], which allows sending bucket body's, full buckets or dummy messages.
//! The codec will not return [`LevinMessage`] instead it will only return bucket body's. [`LevinMessage`] allows
//! for more control over what is actually sent over the wire at certain times.
use bytes::{Bytes, BytesMut};

use crate::{
    header::{Flags, HEADER_SIZE},
    Bucket, BucketBuilder, BucketEr
    
pub(crate) fn make_dummy_message<T: LevinCommand>(protocol: &Protocol, size: usize) -> Bucket<T> {
    // A header to put on the dummy message.
    let header = BucketHead {
        signature: protocol.signature,
        size: size.try_into().expect("Bucket size does not fit into u64"),
        have_to_return_data: false,
        // Just use a default command.
        command: T::from(0),
        return_code: 0,
        flags: Flags::DUMMY,
        protocol_version: protocol.version,
    };

    let body = Bytes::from(vec![0; size - HEADER_SIZE]);

    Bucket { header, body }
}