private void forwardMouseMotionEvent(MouseEvent e) {
			e.consume();
			MouseEvent newEvent = SwingUtilities.convertMouseEvent(e.getComponent(), e, tabbedPane);
			tabbedPane.dispatchEvent(newEvent);
		}
This lets rollover highlighting happen when over the TabContainer.
Ghidra/Framework/Docking/src/main/java/docking/widgets/tabbedpane/DockingTabRenderer.java