Communicate Slate widget with objects in Play in editor PIE

Development Programming & Scripting
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Hi, I could guess this could be a bit of a contradictive question but I wounder if a Slate widget could communicate with objects in general during Play in editor mode via some derived UObject class to make a UFunction BlueprintCallable event? Or if that is not possible, have some sort of global controller class that can communicate between Slate widget and UObject? The reason I want to use a Slate widget is I feel I have more control over creating a TreeView UI there rather than in a EditorUtilityWidget.
Any help or point in direction is appreciated.
Thanks!

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I found this Q&A that deals with my question: https://forums.unrealengine.com/t/is-it-possible-to-use-slate-widget-in-umg/349785