StreamToLoop: inline simple common method references

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterCollect3.java

@@ -8,7 +8,7 @@ public class Main {
   private static void test(List<String> list) {
       StringBuilder sb = new StringBuilder();
       for (String str : list) {
-          if (Objects.nonNull(str)) {
+          if (str != null) {
               sb.append(str);
           }
       }