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: cli.rs
    path of file: ./repos/tauri/tooling/webdriver/src
    
    the code of the file until where you have to start completion: // Copyright 2019-2024 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

use std::path::PathBuf;

const HELP: &str = "\
USAGE: tauri-driver [FLAGS] [OPTIONS]

FLAGS:
  -h, --help              Prints help information

OPTIONS:
  --port NUMBER           Sets the tauri-driver intermediary port
  --native-port NUMBER    Sets the port of the underlying WebDriver
  --native-host HOST      Sets the host of the underlying WebDriver (Linux only)
  --native-driver PATH    Sets the path to the native WebDriver binary
";

#[derive(Debug, Clone)]
pub struct Args {
  pub port: u16,
  pu
    
  fn from(mut args: pico_args::Arguments) -> Self {
    // if the user wanted help, we don't care about parsing the rest of the args
    if args.contains(["-h", "--help"]) {
      println!("{}", HELP);
      std::process::exit(0);
    }

    let native_driver = match args.opt_value_from_str("--native-driver") {
      Ok(native_driver) => native_driver,
      Err(e) => {
        eprintln!("Error while parsing option --native-driver: {}", e);
        std::process::exit(1);
      }
    };

    let parsed = Args {
      port: args.value_from_str("--port").unwrap_or(4444),
      native_port: args.value_from_str("--native-port").unwrap_or(4445),
      native_host: args
        .value_from_str("--native-host")
        .unwrap_or(String::from("127.0.0.1")),
      native_driver,
    };

    // be strict about accepting args, error for anything extraneous
    let rest = args.finish();
    if !rest.is_empty() {
      eprintln!("Error: unused arguments left: {:?}", rest);
      eprintln!("{}", HELP);
      std::process::exit(1);
    }

    parsed
  }