There is not a single way to get the IObjectInstance from IBehaviorInstanceBase or a IBehaviorInstance in the Editor API of Addon SDK
Please could you add a GetObjectInstanceBase()
Because we can't do anything thanks to behavior in Editor as behavior don't let us do anything - only ObjectInstances have useful methods
I'm currently stuck on an urgent work because of this.
Edit : I also posted a dedicated request : construct23.ideas.aha.io/ideas/C23-I-468
If you find some time to add it for this week beta it would save me ! 😅