!7

p {
  JDesktopPane desktop = jDesktopPane();
  showFrame(desktop);
  handleCtrlTab_dev(desktop);
  showInternalFrame(desktop, "bla", jlabel("bla"));
  showInternalFrame(desktop, "bla2", jlabel("bla2"));
  showInternalFrame(desktop, "bla3", jlabel("bla3"));
}