{
    "packages": [
        {
            "name": "foo/bar",
            "version": "1.0.0",
            "type": "library",
            "extra": {
                "some_key": "never remove extra section",
                "other_key": "other value"
            }
        },
        {
            "name": "foo/baz",
            "version": "1.0.0",
            "type": "composer-plugin",
            "target-dir": "code",
            "extra": {
                "some_key": "never remove extra section",
                "other_key": "other value"
            }
        }
    ],
    "packages-dev": []
}