metamask-extension/test/data/fetch-mocks.json

{
  "gasPricesBasic": {
    "average": 85,
    "fast": 200,
    "safeLow": 80
  },
  "metametrics": {
    "mockMetaMetricsResponse": true
  },
  "swaps": {
    "featureFlag": {
      "status": {
        "active": true
      }
    }
  }
}