pkg/front_end/test/enable_non_nullable/data/.dart_tool/package_config.json

{
  "configVersion": 2,
  "packages": [
    {
      "name": "allowed_package",
      "rootUri": "../allowed_package/",
      "packageUri": "lib/",
      "languageVersion": "2.9"
    },
    {
      "name": "not_allowed_package",
      "rootUri": "../not_allowed_package/",
      "packageUri": "lib/",
      "languageVersion": "2.9"
    }

  ]
}