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: fs_try_exists.rs
    path of file: ./repos/tokio/tokio/tests
    
    the code of the file until where you have to start completion: #![warn(rust_2018_idioms)]
#![cfg(all(feature = "full", not
    
async fn try_exists() {
    let dir = tempdir().unwrap();

    let existing_path = dir.path().join("foo.txt");
    fs::write(&existing_path, b"Hello File!").await.unwrap();
    let nonexisting_path = dir.path().join("bar.txt");

    assert!(fs::try_exists(existing_path).await.unwrap());
    assert!(!fs::try_exists(nonexisting_path).await.unwrap());
    // FreeBSD root user always has permission to stat.
    #[cfg(all(unix, not(target_os = "freebsd")))]
    {
        use std::os::unix::prelude::PermissionsExt;
        let permission_denied_directory_path = dir.path().join("baz");
        fs::create_dir(&permission_denied_directory_path)
            .await
            .unwrap();
        let permission_denied_file_path = permission_denied_directory_path.join("baz.txt");
        fs::write(&permission_denied_file_path, b"Hello File!")
            .await
            .unwrap();
        let mut perms = tokio::fs::metadata(&permission_denied_directory_path)
            .await
            .unwrap()
            .permissions();

        perms.set_mode(0o244);
        fs::set_permissions(&permission_denied_directory_path, perms)
            .await
            .unwrap();
        let permission_denied_result = fs::try_exists(permission_denied_file_path).await;
        assert_eq!(
            permission_denied_result.err().unwrap().kind(),
            std::io::ErrorKind::PermissionDenied
        );
    }
}