Spring Cloud Openfeign Make FeignCircuitBreaker public

Is your feature request related to a problem? Please describe. Would it be possible to make FeignCircuitBreaker.Builder in case we want to extend it? I can see in the documentation we can define a @Primary bean for the feignBuilder, but I would like to make a custom one extending FeignCircuitBreaker.

Describe the solution you'd like Make FeignCircuitBreaker so clients could extend it.

Describe alternatives you've considered NA

Additional context We have a custom feign builder with some company specifics requirements. As we basically extends from Feign.Builder, would be convenient to extend it from FeignCircuitBreaker.Builder so we could have it integrated with openfeign.