Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/6000#discussion_r187798729
--- Diff: docs/dev/stream/operators/windows.md ---
@@ -730,9 +730,9 @@ input
/* ... */
-public class MyProcessWindowFunction implements
ProcessWindowFunction<Tuple<String, Long>, String, String, TimeWindow> {
+public static class MyProcessWindowFunction extends
ProcessWindowFunction<Tuple<String, Long>, String, String, TimeWindow> {
--- End diff --
In other code samples, we don't put the `static`, not assuming that this is
defined as an inner class
---
