pub fn handle_errors<E, F, Ok, Err>(source: E, f: F) -> Eventual<Ok> where
    E: IntoReader<Output = Result<Ok, Err>>,
    F: 'static + Send + FnMut(Err),
    Ok: Value,
    Err: Value
👎 Deprecated:

Not deterministic. This is a special case of filter. Retry should be better