Allow custom attributes in definition

[opyate]

I'd like to be able to add custom attributes to the definition, e.g. these.

I've tried something like this:

app.use(swagger.express(
  {
    definition: {
      info: {
        title: "My API",
        version: "1.0"
      },
      host: 'example.org',
      'x-google-allow': 'all',
      externalDocs: {
        url: "http:/example.org"
      }
    },
  }
))

...but it doesn't work. Is there a way to allow custom attributes?

Thanks!