{
  "lesson": "M-D006",
  "targetProduct": "not_run",
  "nativePractice": "author_original_input_and_reference",
  "dataIdentity": "synthetic author-owned examples, expected values are acceptance references",
  "assets": [],
  "sources": [
    {
      "url": "https://github.com/google-labs-code/design.md",
      "title": "unknown-key与token-like-ignored规则、扩展保留",
      "feature": "unknown-key与token-like-ignored规则、扩展保留"
    }
  ]
}