API for creating and getting groups?

[blacklight]

I haven't found, neither in the docs nor in the source code, any API to create groups or get the groups registered on the network.

It is possible to get the ZWaveGroup objects from the groups property of ZWaveNode, add and remove nodes, change group attributes etc., but there's no equivalent for groups to e.g. ZWaveNetwork.create_scene or ZWaveNetwork.get_scenes. Is this intentional, a lacking feature, or am I missing something?