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: option_env_unwrap.rs
    path of file: ./repos/rust-clippy/tests/ui
    
    the code of the file until where you have to start completion: //@aux-build:proc_macros.rs
#![warn(clippy::option_env
    
fn main() {
    let _ = option_env!("PATH").unwrap();
    let _ = option_env!("PATH").expect("environment variable PATH isn't set");
    let _ = option_env!("__Y__do_not_use").unwrap(); // This test only works if you don't have a __Y__do_not_use env variable in your environment.
    let _ = inline!(option_env!($"PATH").unwrap());
    let _ = inline!(option_env!($"PATH").expect($"environment variable PATH isn't set"));
    let _ = external!(option_env!($"PATH").unwrap());
    let _ = external!(option_env!($"PATH").expect($"environment variable PATH isn't set"));
}