{
  "name": "an unknown method name",
  "description": "Version skew and local port-scanning both look like this. Neither gets a useful reply.",
  "request": {
    "jsonrpc": "2.0",
    "id": 109,
    "method": "download.deleteEverything",
    "params": {}
  },
  "response": {
    "jsonrpc": "2.0",
    "id": 109,
    "error": {
      "code": -32601,
      "message": "no such method"
    }
  },
  "assertions": [
    "the reply does not enumerate valid methods",
    "an unknown method never closes the connection: a newer client may simply be probing for a capability"
  ]
}