throw new GLException(message);
runExit();
    private void checkExtension(GL gl, String extensionName) {      if (!gl.isExtensionAvailable(extensionName)) {        String message = "Unable to initialize " + extensionName + " OpenGL extension";        JOptionPane.showMessageDialog(null, message, "Unavailable extension", JOptionPane.ERROR_MESSAGE);	throw new GLException(message);      }    }