message: Fetch: use ReadableStream<Uint8Array>
diff: }
  }
  }
  + },
  + "Body": {
  + "name": "Body",
  + "properties": {
  + "property": {
  + "body": {
  + "name": "body",
  + "override-type": "ReadableStream<Uint8Array> | null"
  + }
  + }
  + }
  }
  }
  },
  }
  },
  "typedefs": {
  - "typedef": []
  + "typedef": [
  + {
  + "override-type": "Blob | BufferSource | FormData | URLSearchParams | ReadableStream<Uint8Array> | string",
  + "new-type": "BodyInit"
  + }
  + ]
  }
  }
  