def unsubscribe
      response = Rdkafka::Bindings.rd_kafka_unsubscribe(@native_kafka)
      if response != 0
        raise Rdkafka::RdkafkaError.new(response)
      end
    end
def unsubscribe
      response = Rdkafka::Bindings.rd_kafka_unsubscribe(@native_kafka)
      if response != 0
        raise Rdkafka::RdkafkaError.new(response)
      end
    end
Unsubscribe from all subscribed topics.

 @raise [RdkafkaError] When unsubscribing fails

 @return [nil]