IDEA-120784 "Class is public should be declared in a file named <Classname>.java" for inner interface

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/newMethodRef/AfterCollectors2.java

@@ -17,7 +17,7 @@ interface S<T> {
 
 interface F<TF> {}
 
-public final class Collectors {
+final class Collectors {
     public static <T>
     Collector<List<T>> toList() {
         return null;