code: @Override
      protected void uninstallDefaults() {
          if (spinner.getLayout() instanceof UIResource) {
              spinner.setLayout(null);
          }
  
          SeaGlassContext context = getContext(spinner, ENABLED);
  
          style.uninstallDefaults(context);
          context.dispose();
          style = null;
      }
docs: Sets the <code>JSpinner's</code> layout manager to null.  This
  method is called by <code>uninstallUI</code>.
  
  @see #installDefaults
  @see #uninstallUI