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/rhack/src/cmd
    
    the code of the file until where you have to start completion: mod edit;
mod undo;

use std::env;
use std::fs;
use std::path::PathBuf;
use std::process::Command;

use anyhow::{anyhow, Result};
use clap::{AppSettings, Parser};
use serde_json::Value;
use toml_edit::Document;

pub use edit::Edit;
pub use undo::U
    
pub fn load_manifest(manifest_path: &str) -> Result<Document> {
    let manifest = match fs::read_to_string(&manifest_path) {
        Ok(b) => b,
        Err(err) => return Err(anyhow!("failed to read from {}: {:#}", &manifest_path, err)),
    };
    match manifest.parse::<Document>() {
        Ok(m) => Ok(m),
        Err(err) => Err(anyhow!("failed to parse {}: {:#}", &manifest_path, err)),
    }
}