(PECL rdkafka >= 4.0.0, librdkafka >= 0.9.1)
RdKafka\KafkaConsumer::close — Close down the KafkaConsumer
Close down the KafkaConsumer. This call will block until the consumer has revoked its assignment, calling the rebalance_cb if it is configured, committed offsets to broker, and left the consumer group. The maximum blocking time is roughly limited to session.timeout.ms.