Smack 4.1.0-Alpha4 and an issue with ProviderManager.addStreamFeatureProvider

It looks like Smack 4.1.0-Alpha4 has introduced generic types into the ProviderManager class.

Unfortunately the signature of the addStreamFeatureProvider now looks like this:

addStreamFeatureProvider(String elementName, String namespace, PacketExtensionProvider<PacketExtension> provider)

Which seems to require a parameter of type PacketExtensionProvider<PacketExtension> to be provided. Seeing as how PacketExtension is an interface, my code is now getting all kinds of compiler errors. Previously the following would work fine:

ProviderManager.addStreamFeatureProvider(ELEMENT, NAMESPACE, new StreamManagementStreamFeatureProvider());

But now it fails to compile.

It feels like the method should actually be:

addStreamFeatureProvider(String elementName, String namespace, PacketExtensionProvider<? extends PacketExtension> provider)

To allow for extension of PacketExtension and not just packet extension itself.

Or am I missing something?