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: package.rs
    path of file: ./repos/CYFS/src/service/ood-daemon/src/package
    
    the code of the file until where you have to start completion: use cyfs_base::BuckyError;

use fs_extra::dir;
use std::fs;
use std::io::BufReader;
use std::path::{Path, PathBuf};
use zip;

pub struct ServicePackage {
    file: PathBuf,
    tmp_dir: PathBuf,
}

pub fn return_error<T>(msg: &str) -> Result<T, BuckyError> {
    error!(
    
    fn update_version_file(root: &Path, fid: &str) {
        let version_file = root.join("version");
        if let Err(e) = fs::write(&version_file, fid) {
            error!(
                "create version file error: {} {}",
                version_file.display(),
                e
            );
        }
    }