{
  "title": "The internet's Own boy",
  "related": [
    { "title": "This shrimp is awesome" }
  ]
}

{
  "title": "The internet's Own boy",
  "related": [
    {
      "title": "This shrimp is awesome",
      "author": { "name": "David Doe" },
      "category": { "name": "nature" },
      "blocks": [ ... ],
      "related": [ /* stops here — only ids */ ]
    }
  ]
}

"populate-all": {
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}