StreamToLoop: support Optional unwrap if possible

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

@@ -0,0 +1,15 @@
+// "Replace Stream API chain with loop" "true"
+
+import java.util.Arrays;
+import java.util.List;
+
+public class Main {
+  private static String test(List<String> list) {
+    if (list == null) return null;
+    else return list.stream().filter(str -> str.contains("x")).fin<caret>dFirst().orElseGet(() -> null);
+  }
+
+  public static void main(String[] args) {
+    System.out.println(test(Arrays.asList("a", "b", "syz")));
+  }
+}