Function diem_retrier::retry_async

pub async fn retry_async<'a, I, O, T, E>(
    iterable: I,
    operation: O
) -> Result<T, E>where
    I: IntoIterator<Item = Duration>,
    O: FnMut() -> Pin<Box<dyn Future<Output = Result<T, E>> + Send + 'a>>,
    E: Display + Debug,