Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/692#discussion_r30781162
--- Diff:
flink-staging/flink-ml/src/main/scala/org/apache/flink/ml/optimization/Solver.scala
---
@@ -106,7 +139,7 @@ object Solver {
* See [[https://en.wikipedia.org/wiki/Iterative_method Iterative Methods
on Wikipedia]] for more
* info
*/
-abstract class IterativeSolver extends Solver {
+abstract class IterativeSolver() extends Solver() {
--- End diff --
Do we need the empty parenthesis?
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