Custom inspector draw Gizmos

I try to draw a gizmo from my custom inspector.

The documentation says that I should be able to use OnSceneGUI()

In the OnSceneGUI you can do eg. mesh editing, terrain painting or advanced gizmos If call Event.current.Use(), the event will be "eaten" by the editor and not be used by the scene view itself.

But instead I get error that I can only draw from OnGizmos.

How do I draw gizmos from the editor?