how to use jwks?

I'm upgrading an out-of-date application from 0.3.x to 1.0, and I don't understand how to use JWKS now? Previously you could supply a JWKSet object to JWT and it would automatically fetch the correct key based on the keyid, but I don't see any methods in this codebase any more that call the JWKSet's `filter_keys` method. Am I missing something?