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: mod.rs
    path of file: ./repos/regex/regex-cli/cmd/debug
    
    the code of the file until where you have to start completion: use std::io::{stdout, Write};

use crate::{
    args,
    util::{self, Table},
};

mod dfa;
mod literal;

pub fn run(p: &mut lexopt::Parser) -> anyhow::Result<()> {
    const USAGE: &'static str = "\
Prints t
    
fn run_ast(p: &mut lexopt::Parser) -> anyhow::Result<()> {
    const USAGE: &'static str = "\
Prints the debug representation of an abstract syntax tree (AST).

USAGE:
    regex-cli debug ast <pattern>

TIP:
    use -h for short docs and --help for long docs

OPTIONS:
%options%
";

    let mut common = args::common::Config::default();
    let mut patterns = args::patterns::Config::positional();
    let mut syntax = args::syntax::Config::default();
    args::configure(p, USAGE, &mut [&mut common, &mut patterns, &mut syntax])?;

    let pats = patterns.get()?;
    anyhow::ensure!(
        pats.len() == 1,
        "only one pattern is allowed, but {} were given",
        pats.len(),
    );

    let mut table = Table::empty();
    let (asts, time) = util::timeitr(|| syntax.asts(&pats))?;
    table.add("parse time", time);
    if common.table() {
        table.print(stdout())?;
    }
    if !common.quiet {
        if common.table() {
            writeln!(stdout(), "")?;
        }
        writeln!(stdout(), "{:#?}", &asts[0])?;
    }
    Ok(())
}