Support for Multitimbre Units in VST3, AU


I wonder, if there are plans to support Units anytime soon. To recall, this concept allows the plugins to expose its parameters grouped according to their intern multi timbral subdivision. As an example, a sampler plugin has loaded multiple instruments. Each of them would be a Unit. Any functionality related to this feature is not implemented in the JUCE VST3 wrapper. If I want to support this, do I have to roll my own version of the juce_VST3_Wrapper ? Among other reasons, it would break my workflow with Projucer, which would be a big productivity bump.