He-Pin commented on code in PR #989:
URL: https://github.com/apache/incubator-pekko/pull/989#discussion_r1460744210
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docs/src/main/paradox/stream/operators/Sink/forall.md:
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+# Sink.forall
+
+Apply a predicate function to assert each element received, it returns true if
all elements satisfy the assertion, otherwise it returns false.
+
+@ref[Sink operators](../index.md#sink-operators)
+
+## Signature
+
+@apidoc[Sink.forall](Sink$) {
scala="#forall(predicate:T=>U):org.apache.pekko.stream.scaladsl.Sink[T,scala.concurrent.Future[Boolean]]"
java="#forall(org.apache.pekko.japi.function.Predicate)" }
+
+## Description
+forall applies a predicate function to assert each element received, it
returns true if all elements satisfy the assertion, otherwise it returns false.
+
+It materializes into a `Future` (in Scala) or a `CompletionStage` (in Java)
that completes with the last state when the stream has finished.
+
+notes: if source is empty, it will return true
Review Comment:
Notes.
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