ifclass JExtendedTabbedPane
  svoid addTab(JExtendedTabbedPane tabs, S title, Component c default jpanel()) {
    if (tabs != null) swing {
      tabs.add(title, wrap(c));
    }
  }
  
  svoid addTab(JExtendedTabbedPane tabs, S title, Swingable c) {
    if (tabs != null) swing {
      tabs.add(title, wrap(c));
    }
  }
endif

svoid addTab(JTabbedPane tabs, S title, Component c default jpanel()) {
  if (tabs != null) swing {
    tabs.add(title, wrap(c));
  }
}

svoid addTab(JTabbedPane tabs, S title, Swingable c) {
  if (tabs != null) swing {
    tabs.add(title, wrap(c));
  }
}

meta-for Component also as Swingable {
  svoid addTab(JTabbedPane tabs, WithToolTip<S> title, Component c) {
    addTabWithToolTip(tabs, title.toolTip(), title?!, c);
  }
}