src/share/classes/javax/swing/plaf/basic/BasicListUI.java

*** 2832,2841 ****
--- 2832,2842 ----
          return index < list.getModel().getSize() ? index : -1;
      }
  
      private static final TransferHandler defaultTransferHandler = new ListTransferHandler();
  
+     @SuppressWarnings("serial") // Superclass is a JDK-implementation class
      static class ListTransferHandler extends TransferHandler implements UIResource {
  
          /**
           * Create a Transferable to use as the source for a data transfer.
           *