static <T> HttpResponse.PushPromiseHandler<T>
of(Function<HttpRequest,HttpResponse.BodyHandler<T>> pushPromiseHandler, ConcurrentMap<HttpRequest,CompletableFuture<HttpResponse<T>>> pushPromisesMap)
abstract <T> CompletableFuture<HttpResponse<T>>
sendAsync(HttpRequest request, HttpResponse.BodyHandler<T> responseBodyHandler, HttpResponse.PushPromiseHandler<T> pushPromiseHandler)