Github user kl0u commented on a diff in the pull request:
https://github.com/apache/flink/pull/3484#discussion_r105403355
--- Diff:
flink-streaming-java/src/test/java/org/apache/flink/streaming/util/MockOutput.java
---
@@ -40,6 +41,12 @@ public void collect(StreamRecord<T> record) {
}
@Override
+ public <X> void collect(
--- End diff --
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