Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/5501#discussion_r173150593
--- Diff:
flink-scala/src/main/scala/org/apache/flink/api/scala/metrics/ScalaGauge.scala
---
@@ -23,6 +23,7 @@ import org.apache.flink.metrics.Gauge
/**
* This class allows the concise definition of a gauge from Scala using
function references.
*/
+@deprecated("use NumberGauge or StringGauge instead")
--- End diff --
Would be good to add a `ScalaStringGauge` and a `ScalaNumericGauge`.
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