Function export_op 

pub async fn export_op(
    t: &Transport,
    list_ids: &[String],
    tag: Option<&str>,
    namespace: Option<&str>,
    format: Format,
) -> Result<ExportOutcome>

Export the selected containers and their items.

The body is the raw _export concatenation, which _import accepts verbatim. YAML bundle export is unsupported.