babel/packages/babel-plugin-transform-react-jsx/test/fixtures/react/should-warn-when-importSource-is-set/options.json

{
  "plugins": [
    [
      "transform-react-jsx",
      {
        "runtime": "automatic",
        "importSource": "foo"
      }
    ]
  ],
  "sourceType": "module",
  "throws": "importSource cannot be set when runtime is classic."
}