private void validateFocusability() {
		Container focusCycleRootAncestor = dockComp.getFocusCycleRootAncestor();
		FocusTraversalPolicy policy = focusCycleRootAncestor.getFocusTraversalPolicy();
		Component firstComponent = policy.getFirstComponent(dockComp);
		if (firstComponent == null) {
			ComponentPlaceholder info = dockComp.getComponentWindowingPlaceholder();
			String title = "";
			if (info != null) {
				title = ": Title: " + info.getTitle() + "";
			}
			Msg.debug(this,
				"Found a Component Provider that does not contain a focusable component" +
					title +
					". Component Providers are required to have at least one focusable component!");
			setSelected(false); // can't select it can't take focus
		}
	}
Signals to use the GUI to make this header (and its provider) stand out from the rest.
Ghidra/Framework/Docking/src/main/java/docking/DockableHeader.java