I have tried to use the Change Version (ArcGIS Pro 2.4 API Reference Guide) method on my current map and do not get the results I would expect. I copied the code example directly into a button action. The UI doesn't show that the version has changed and there are no errors reported. My Map has layers using the classic versioning model. Is there something else that needs to be done to the UI to refresh? Is there another way to get all the layers in a map to point to a different version?