babel/packages/babel-plugin-proposal-pipeline-operator/test/fixtures/no-proposal/options.json

{
  "plugins": ["proposal-pipeline-operator"],
  "throws": "The pipeline plugin requires a \"proposal\" option. \"proposal\" must be one of: \"minimal\", \"fsharp\", \"hack\", \"smart\". See <https://babeljs.io/docs/en/babel-plugin-proposal-pipeline-operator>."
}