static <V> HttpResponse.MultiProcessor<MultiMapResult<V>,V>
asMap(Function<HttpRequest,Optional<HttpResponse.BodyHandler<V>>> pushHandler)
asMap(Function<HttpRequest,Optional<HttpResponse.BodyHandler<V>>> pushHandler, boolean completion)
abstract <U,T> CompletableFuture<U>
sendAsync(HttpRequest req, HttpResponse.MultiProcessor<U,T> multiProcessor)