Getting SceneView in Editor as Variable

I’m trying to get the SceneView but all of them return null.
Is this Unity Pro or something.

I try to get them in a function called from a button click.

SceneView.currentDrawingSceneView;
SceneView.sceneViews;
SceneView.lastActiveSceneView;

Debug.Log returns null for all of them.

You have to have clicked in a SceneView for these calls to register, or at least that has been my experience.