src/macosx/classes/com/apple/laf/AquaLookAndFeel.java

@@ -36,10 +36,11 @@
 import javax.swing.plaf.basic.BasicLookAndFeel;
 import static javax.swing.UIDefaults.LazyValue;
 import sun.swing.*;
 import apple.laf.*;
 
+@SuppressWarnings("serial") // Superclass is not serializable across versions
 public class AquaLookAndFeel extends BasicLookAndFeel {
     static final String sOldPropertyPrefix = "com.apple.macos."; // old prefix for things like 'useScreenMenuBar'
     static final String sPropertyPrefix = "apple.laf."; // new prefix for things like 'useScreenMenuBar'
 
     // for lazy initalizers. Following the pattern from metal.