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: downloader.rs
    path of file: ./repos/bebop/Tools/cargo/src
    
    the code of the file until where you have to start completion: use json::JsonValue;
use std::env::consts::ARCH;
use std::fs::{self, File};
use std::path::{Path, PathBuf};

/// Version of bebopc to download
pub const BEBOPC_VERSION: &str = env!("CARGO_PKG_VERSION");

/// Download the 
    
fn mv(from: impl AsRef<Path>, to: impl AsRef<Path>) {
    if to.as_ref().is_dir() {
        // gotta support windows which is a special child
        // uvm_move_dir::move_dir(from, to).expect("Failed to move directory")
        unimplemented!()
    } else {
        fs::rename(from, to).expect("Failed to mv");
    }
}