{
  "name": "invalid/unknown-top-level-key",
  "why": "§4: an unknown key throws",
  "rules": {
    "colums": [
      {
        "key": "v"
      }
    ]
  },
  "rows": [
    {
      "v": "x"
    }
  ],
  "expect": {
    "throws": "unknown key \"colums\""
  }
}