content: <fold text='[...]'>[
      1,
      funcs<fold text='[...]'>["foo"]</fold>,
      <fold text='[...]'>[
      <fold text='[...]'>[foo, bar, baz]</fold>,
          [],
          <fold text='[...]'>[
              foo()
              bar()
              baz()
          ]</fold>
      ]</fold>
  ]</fold>