It is a copy-paste of BoundedOutOfOrdernessTimestampExtractor but taking timestamp from previousElementTimestamp See https://ci.apache.org/projects/flink/flink-docs-stable/dev/connectors/kafka.html#using-kafka-timestamps-and-flink-event-time-in-kafka-010
It is a copy-paste of BoundedOutOfOrdernessTimestampExtractor but taking timestamp from previousElementTimestamp See https://ci.apache.org/projects/flink/flink-docs-stable/dev/connectors/kafka.html#using-kafka-timestamps-and-flink-event-time-in-kafka-010