Github user tzulitai commented on the issue:
https://github.com/apache/flink/pull/5069
Ah, I just realized that my comment on the last review is irrelevant, since
`org.apache.flink.streaming.util.serialization.SerializationSchema` extends
`org.apache.flink.api.common.serialization.SerializationSchema`, meaning that
there is no API-breaking change.
Sorry about this. The PR is good to go without the extra follow-up fix.
Merging the first commit.---
