static JComponent getTitlePaneComponent(RootPaneContainer window) {
  if (window instanceof JInternalFrame)
	  ret getInternalFrameTitlePaneComponent((JInternalFrame) window);
	  
  if (!substanceLookAndFeelEnabled() || window == null) ret null;
	JRootPane rootPane = window.getRootPane();
	if (rootPane != null) {
		O /*SubstanceRootPaneUI*/ ui = rootPane.getUI();
		return (JComponent) call(ui, "getTitlePane");
	}
	return null;
}