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: args.rs
    path of file: ./repos/sentry-cli/src/utils
    
    the code of the file until where you have to start completion: use anyhow::{bail, Result};
use chrono::{DateTime, TimeZone, Utc};
use clap::{Arg, ArgAction, Command};

fn validate_org(v: &str) -> Result<String, String> {
    if v.contains('/') || v == "." || v == ".." || v.contains(' ') {
        Err("Invalid value for organization. Use the URL slug and not the name!".to_string())
    } else {
        Ok(v.to_owned())
    }
}

pub fn validate_project(v: &str)
    
fn validate_release(v: &str) -> Result<String, String> {
    if v.trim() != v {
        Err(
            "Invalid release version. Releases must not contain leading or trailing spaces."
                .to_string(),
        )
    } else if v.is_empty()
        || v == "."
        || v == ".."
        || v.find(&['\n', '\t', '\x0b', '\x0c', '\t', '/'][..])
            .is_some()
    {
        Err(
            "Invalid release version. Slashes and certain whitespace characters are not permitted."
                .to_string(),
        )
    } else {
        Ok(v.to_owned())
    }
}