src/java.desktop/share/classes/java/awt/SentEvent.java

@@ -45,10 +45,11 @@
     static final int ID =
         java.awt.event.FocusEvent.FOCUS_LAST + 2;
 
     boolean dispatched;
     private AWTEvent nested;
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private AppContext toNotify;
 
     SentEvent() {
         this(null);
     }