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: args.rs
    path of file: ./repos/bottlerocket/sources/api/migration/migrator/src
    
    the code of the file until where you have to start completion: //! This module handles argument parsing for the migrator binary.

use bottlerocket_release::BottlerocketRelease;
use semver::Version;
use simplelog::LevelFilter;
use std:
    
fn usage() -> ! {
    let program_name = env::args().next().unwrap_or_else(|| "program".to_string());
    eprintln!(
        r"Usage: {}
            --datastore-path PATH
            --migration-directory PATH
            --root-path PATH
            --metadata-directory PATH
            (--migrate-to-version x.y | --migrate-to-version-from-os-release)
            [ --no-color ]
            [ --log-level trace|debug|info|warn|error ]",
        program_name
    );
    process::exit(2);
}