{
  "pages": [
    {
      "subpages": [
        {
          "slug": "subpage-1"
        },
        {
          "slug": "subpage-2"
        }
      ],
      "slug": "page-1"
    },
    {
      "subpages": [
        {
          "slug": "subpage-1"
        },
        {
          "slug": "subpage-2"
        }
      ],
      "slug": "page-2"
    }
  ]
}
.
$-- see #15
$for(pages)$
/$pages.slug$
$for(pages.subpages)$
  /$pages.slug$/$pages.subpages.slug$
$endfor$
$endfor$
.
/page-1
  /page-1/subpage-1
  /page-1/subpage-2
/page-2
  /page-2/subpage-1
  /page-2/subpage-2