Implement a way to tell that a graphic is being clustered

JacobCurrier

Currently their is no way to tell if a graphic is clustered. I'd like a way to know what graphics within an overlay are being clustered such as a Graphic property like isClustered or a property on GraphicOverlay that returns the AggregateGeoElements. 

DiveshGoyal

https://community.esri.com/t5/swift-maps-sdk-questions/how-to-tell-if-a-graphic-is-clustered/m-p/1549095#M445