@Override
	protected boolean matches() {
		return UIManager.getLookAndFeel() instanceof FlatLaf;
	}
SwingX LaF addon.

This class is required because without this class, the system addon would be used,
which may result in wrong UI defaults. (e.g. background of TaskPaneContainer)

@author Karl Tauber
flatlaf-swingx/src/main/java/com/formdev/flatlaf/swingx/FlatLookAndFeelAddons.java