Github user thvasilo commented on the issue:
https://github.com/apache/flink/pull/2684
Thank you for your contribution Thomas!
The changes look mostly fine I think, my only concern is the need to cast
the types in lines
[215-216](https://github.com/apache/flink/pull/2684/files#diff-c74d49c94a86f962939a42362f3ea190R215),
I'm not sure if there is a more elegant way to do that.
I'm going to ping @chiwanpark, @mbalassi and @tillrohrmann, if anyone has
some time to review and merge this let us know in the comments.
As a side note, I've noticed that we don't include the evaluate operation
in the documentation of all Predictors, so I've created
[FLINK-4908](https://issues.apache.org/jira/browse/FLINK-4908) to track that.
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