Description =========== confluent_kafka.Producer class has Owner. This is making any class that takes a dependency on Producer not testable. How to reproduce ================ Create a class that takes dependency on Producer object. The Producer object cannot be mocked. Checklist ========= Please provide the following information: - [x] confluent-kafka-python and librdkafka version (`confluent_kafka.version()` and `confluent_kafka.libversion()`): - [ ] Apache Kafka broker version: - [ ] Client configuration: `{...}` - [ ] Operating system: - [ ] Provide client logs (with `'debug': '..'` as necessary) - [ ] Provide broker log excerpts - [ ] Critical issue