StreamToLoopInspection: support inside single-expression lambdas

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

@@ -0,0 +1,17 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Objects;
+import java.util.function.DoubleSupplier;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class Main {
+  public void test(String... list) {
+    DoubleSupplier s = () -> Stream.of(list).filter(Objects::nonNull).co<caret>llect(Collectors.averagingLong(String::length));
+    System.out.println(s.getAsDouble());
+  }
+
+  public static void main(String[] args) {
+    new Main().test("a", "bbb", null, "cc", "dd", "eedasfasdfs");
+  }
+}