VST3 sidechain

I’ve pulled JUCE 4 and upgraded the audio bus configuration to use the new buss configuration classes. I was able to add an additional input buss and use it for side chaining in Reaper. What I’m looking for now is a way to make this work with VST3 (Cubase/Nuendo) which has an explicit side chain input buss that is enabled by a button in the editor frame. I need to know if this supported in JUCE and if so can someone please point me to a document/explanation of how to implement this. Thanks.

This is supported in JUCE. See the NoiseGate example in JUCE/examples/PluginSamples/NoiseGate.