public KafkaSourceBuilder<OUT> setGroupId(String groupId) {
        return setProperty(ConsumerConfig.GROUP_ID_CONFIG, groupId);
    }
Sets the consumer group id of the KafkaSource.

@param groupId the group id of the KafkaSource.
@return this KafkaSourceBuilder.
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/kafka/src/main/java/org/apache/inlong/sort/kafka/source/KafkaSourceBuilder.java