Function select_ret

pub fn select_ret<T>(
    f1: impl Future<Output = T> + Unpin,
    f2: impl Future<Output = T> + Unpin,
) -> impl Future<Output = T> + Unpin

Selects between two futures and returns the output from the one that completes first. This function accepts two futures and, using a combinator, races them to yield the result of the first future that resolves.