Use EditorInterface children classes in Godot 4.x?

[mechPenSketch]

Is 4.x at the point where I can use components used in EditorInspector to list properties on another workspace? Apparently, EditorInspector has EditorInspectorCategory and EditorInspectorSection as its children, but both of them seem to be recognized as classes in the script editor, but not "in current scope".

I'ce Ctrl+Clicked on them to see what they're about, but they have empty class reference pages.