Function off_thread 

pub async fn off_thread<T, F>(work: F) -> Result<T, Error>
where
    F: FnOnce() -> Result<T, Error> + Send + 'static,
    T: Send + 'static,

Available on crate feature async only.

Runs blocking configuration work without blocking the caller’s executor.

See load_async for where the work goes.

Errors

Whatever work returns, plus ErrorKind::Backend if it never produced a result.