private void installDebugPainter(Rectangle keepVisibleArea) {

//			GGlassPane glassPane = GGlassPane.getGlassPane(source);
//			for (GGlassPanePainter p : painters) {
//				glassPane.removePainter(p);
//			}
//			ShapeDebugPainter painter = new ShapeDebugPainter();
//
//			glassPane.addPainter(painter);
//			painters.add(painter);
		}
A class that holds info related to the source of a hover request.  This is used to position
the popup window that will be shown.
Ghidra/Framework/Docking/src/main/java/docking/widgets/PopupWindow.java