docs: public static void hideGlassPane(final GlassPaneState state) {
      	Utils4J.checkNotNull("state", state);
          final Component glassPane = state.getGlassPane();
          glassPane.removeMouseListener(state.getMouseListener());
          glassPane.setCursor(state.getCursor());
          glassPane.setVisible(false);
          if (state.getFocusOwner() != null) {
              state.getFocusOwner().requestFocus();
          }
      }