plugin wrapper ? what does it do ?
as said the title what's usage for the plugin wrapper ?
@staiff I also don't know what is Empty and Effect Slot? What are they used for and what are their difference?
The plugin wrapper is just a discontinued approach to embed other JUCE AudioProcessors into HISE.
The Effect slot is a shell for an effect that can be used to dynamically hot swap effects using scripting calls to implement dynamic FX chains. The empty FX is just a null effect that sits in the effect slot until you load something interesting in it.