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: graph.rs
    path of file: ./repos/krates/examples
    
    the code of the file until where you have to start completion: use clap::Parser;
use std::fmt;

/// Simple program to greet a person
#[derive(Parser, Debug)]
struct Args {
    #[arg(short, long)]
    manifest_path: Option<String>,
    #[arg(long)]
    features: Vec<String>,
    #[arg(long)]
    all_features: bool,
    #[arg(long)]
    no_default_features: bool,
    #[arg(long)]
    no_dev: bool,
    #[arg(long, conflicts_with = "manifest_path")]
    json: Option<String>,
}

pub struct Simple {
    id: krates::Kid,
    //features: HashMap<String, Vec<String>>,
}

pub type Graph = krates::Krates<Simple>;

impl From<krates::cm::Package> for Simple {
    fn from(pkg: krates::cm::Package) -> Self {
        Self {
            id: pkg.id.into(),
            //features: pkg.fee
        }
    }
}

impl fmt::Display for Simple {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.write_str(&self.id.repr)
    }
}

fn main() {
    let args = Args::parse();

    let graph: Graph = if let Some(manifest_p
    
fn main() {
    let args = Args::parse();

    let graph: Graph = if let Some(manifest_path) = args.manifest_path {
        let cmd = {
            let mut cmd = krates::Cmd::new();
            if args.all_features {
                cmd.all_features();
            }
            if args.no_default_features {
                cmd.no_default_features();
            }
            if !args.features.is_empty() {
                cmd.features(args.features);
            }
            cmd.manifest_path(manifest_path);
            cmd
        };

        let mut builder = krates::Builder::new();
        if args.no_dev {
            builder.ignore_kind(krates::DepKind::Dev, krates::Scope::All);
        }

        builder.build(cmd, krates::NoneFilter).unwrap()
    } else if let Some(json) = args.json {
        let mut builder = krates::Builder::new();
        if args.no_dev {
            builder.ignore_kind(krates::DepKind::Dev, krates::Scope::All);
        }

        let json = std::fs::read(json).expect("failed to read json");
        let md: krates::cm::Metadata =
            serde_json::from_slice(&json).expect("failed to deserialize metadata from json");

        builder.build_with_metadata(md, krates::NoneFilter).unwrap()
    } else {
        panic!("must specify either --manifest-path or --json");
    };

    let dot = krates::petgraph::dot::Dot::new(graph.graph()).to_string();

    use std::io::Write;
    std::io::stdout().write_all(dot.as_bytes()).unwrap();
}