IDEA-161198 Migration from Stream API back to for loops

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeAllMatch.java

@@ -0,0 +1,16 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.List;
+
+import static java.util.Arrays.asList;
+
+public class Main {
+  public static boolean test(List<List<String>> list) {
+    return list.stream().filter(x -> x != null).flatMap(x -> x.stream()).allMat<caret>ch(x -> x.startsWith("a"));
+  }
+
+  public static void main(String[] args) {
+    System.out.println(test(asList(asList(), asList("a"), asList("b", "c"))));
+    System.out.println(test(asList(asList(), asList("d"), asList("b", "c"))));
+  }
+}