{
  "type": "object",
  "properties": {
    "cacheKey": {
      "instanceof": "Function"
    },
    "cacheIdentifier": {
      "type": "string"
    },
    "cacheDirectory": {
      "type": "string"
    },
    "read": {
      "instanceof": "Function"
    },
    "write": {
      "instanceof": "Function"
    }
  },
  "additionalProperties": false
}