Am assuming (but don't really know) that there is an equivalent in ArcGIS Pro/Utility Network to the Geometric Network for getting network elements from a selected feature. There don't seem to be classes like ISimpleEdgeFeature or ISimpleJunctionFeature that subclass Feature. And there doesn't seem to be anything like a GetNetworkElement() member on the Feature class. But I suspect there is *some* way to do this. If someone could point me in a direction here, that would be much appreciated.
Thx,
Ed
In addition to what Rich listed, Export Subnetwork is also exposed through Rest.