Lack of configuration option in ‘Swagger Gradle Plugin’, which allows to include additional models

Currently, to the best of my knowledge, there is no configuration option in ‘Swagger Gradle Plugin’ (https://github.com/swagger-api/swagger-core/blob/master/modules/swagger-gradle-plugin/README.md), which allows to specify additional (unreachable) models to include. E.g. in models based on the ‘GeoJSON’ standard (https://geojson.org/), Swagger has no access to Geometry sub-types such as Point, LineString, Polygon, etc.

I do realize Swagger Annotations can be used in such cases to specify those sub-types and add discriminator and discriminator-mapping, but our model code is generated off EMF Ecore, therefore we cannot include any custom annotations as these would get overwritten on each build; see https://github.com/eclipse-emf/org.eclipse.emf/issues/27 for more details.

Start with the Swagger Gradle Plugin README linked in the issue, then inspect the modules/swagger-gradle-plugin source and its existing configuration handling. Determine how users could specify unreachable GeoJSON model sub-types without annotations; done means the option is documented and causes those additional models to appear in generated OpenAPI output, with coverage added where the plugin’s tests support it.