Function container_export 

async fn container_export(
    repo: &Repo,
    rev: &str,
    imgref: &ImageReference,
    labels: BTreeMap<String, String>,
    authfile: Option<PathBuf>,
    copy_meta_keys: Vec<String>,
    copy_meta_opt_keys: Vec<String>,
    container_config: Option<Utf8PathBuf>,
    cmd: Option<Vec<String>>,
    compression_fast: bool,
    package_contentmeta: Option<Utf8PathBuf>,
) -> Result<()>

Export a container image with an encapsulated ostree commit.