Github user suez1224 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4585#discussion_r139237307
--- Diff: flink-core/pom.xml ---
@@ -80,6 +80,13 @@ under the License.
<!-- managed version -->
</dependency>
+ <!-- For multiset -->
+ <dependency>
+ <groupId>org.apache.commons</groupId>
--- End diff --
Thanks. Use java.util.Map instead. ---
