{
  "rules": {
    ".read": false,
    ".write": false,
    "tests": {
      "local": {
        "QueryIntegrationTest": {
          ".indexOn": ["height"]
        }
      },
      "travis-ci": {
        "QueryIntegrationTest": {
          ".indexOn": ["height"]
        }
      }
    }
  }
}