Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4612#discussion_r156956706
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/Types.scala
---
@@ -116,7 +191,7 @@ object Types {
*
--- End diff --
Add information about how a Multiset is represented and the nullability of
the set and its entries?---
