Runtime.EntryPreview

{
  "id": "EntryPreview",
  "type": "object",
  "experimental": true,
  "properties": [
    {
      "name": "key",
      "$ref": "ObjectPreview",
      "optional": true,
      "description": "Preview of the key. Specified for map-like collection entries."
    },
    {
      "name": "value",
      "$ref": "ObjectPreview",
      "description": "Preview of the value."
    }
  ]
}