How to configure extensions Spring Boot / jax-rs

Hello, I have some custom annotations in my spring-boot jaxrs project that I would like to remap (not necessarily one-to-one). Which mechanism in https://github.com/swagger-api/swagger-core/wiki/Swagger-2.X---Extensions is best for that, and how do I configure it?. I did try to drop an openapi-configuration.yaml onto the class path (which if it worked it seems I should be able to set filterClass, as one possible approach, there) but it seems to have no effect.