Github user s1ck commented on the pull request:
https://github.com/apache/flink/pull/1471#issuecomment-166341381
Sorry for missing javadoc, I was inspired by the other methods in
`TypeExtractor` ;) The test will be a generic version of `LabelPropagation`,
described in https://issues.apache.org/jira/browse/FLINK-3122 Would that be
enough for a test?
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