+doc #19429 initial merge of docs-dev and docs

akka-docs/rst/scala/code/docs/stream/cookbook/RecipeToStrict.scala

@@ -0,0 +1,27 @@
+package docs.stream.cookbook
+
+import akka.stream.scaladsl.{ Sink, Source }
+
+import scala.collection.immutable
+import scala.concurrent.{ Await, Future }
+import scala.concurrent.duration._
+
+class RecipeToStrict extends RecipeSpec {
+
+  "Recipe for draining a stream into a strict collection" must {
+
+    "work" in {
+      val myData = Source(List("1", "2", "3"))
+      val MaxAllowedSeqSize = 100
+
+      //#draining-to-seq
+      val strict: Future[immutable.Seq[Message]] =
+        myData.grouped(MaxAllowedSeqSize).runWith(Sink.head)
+      //#draining-to-seq
+
+      Await.result(strict, 3.seconds) should be(List("1", "2", "3"))
+    }
+
+  }
+
+}