Function futures_async_combinators::future::or_else

pub async fn or_else<FutA, FutB, F, T, E, U>(future: FutA, f: F) -> Result<T, U> where
    F: FnOnce(E) -> FutB,
    FutA: Future<Output = Result<T, E>>,
    FutB: Future<Output = Result<T, U>>,