// x = names and components interleaving.

// or just components.

// or just names.

// also, you can pass a Collection containing the elements

svoid addTabs(JTabbedPane tabs, O... x) {

  if (tabs == null) ret;

  x = flattenToArray(x);

  for i over x: {

    // is it a component?

    O o = x[i];

    if (isComponentOrSwingable(o))

      addTab(tabs, "Tab " + (tabCount(tabs)+1), wrap(o));

    else {

      // assume it's a tab name, optionally followed by a component

      S toolTip = "";

      // WithToolTip<S> is ok (WithToolTip<Component> not yet supported)

      if (o cast WithToolTip) {

        toolTip = o.toolTip();

        o = o!;

      }

      S name = str(or(o, "Tab " + tabCount(tabs)+1));

      Component c;

      if (isComponentOrSwingable(get(x, i+1)))

        c = wrap(get(x, ++i));

      else

        c = new JPanel;

      addTabWithToolTip(tabs, name, toolTip, wrap(c));

    }

  }

}