code: protected void uninstallDefaults() {
          SeaGlassContext context = getContext(splitPane, ENABLED);
  
          style.uninstallDefaults(context);
          context.dispose();
          style = null;
  
          context = getContext(splitPane, Region.SPLIT_PANE_DIVIDER, ENABLED);
          dividerStyle.uninstallDefaults(context);
          context.dispose();
          dividerStyle = null;
  
          super.uninstallDefaults();
      }
docs: Uninstalls the UI defaults.