Function futures_ext::futures_ordered

pub fn futures_ordered<I>(iter: I) -> FuturesOrdered<I> where
    I: IntoIterator,
    I::Item: IntoFuture, 

Creates a stream which returns results of the futures given.

The returned stream will serially drive execution for all of its underlying futures. Errors from a future will be returned immediately, but the stream will still be valid and