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: main.rs
    path of file: ./repos/rust-for-java-developers/src
    
    the code of the file until where you have to start completion: #[allow(dead_code)]
mod devoxx;
mod ui;

use std::io;
use std::io::Write;

use structopt::StructOpt;

fn main() -> Result<(), failure::Error> {
    // Parse any command-line arguments
    let options = Options::from_args();

    // Run the app
    let result = 
    
fn main() -> Result<(), failure::Error> {
    // Parse any command-line arguments
    let options = Options::from_args();

    // Run the app
    let result = ui::screen::run(options);

    // Write any errors on exit to the screen
    if let Err(e) = result {
        let mut stdout = io::stdout();
        stdout.write_all(format!("{:#?}", e).as_bytes())?;
    }
    Ok(())
}