package com.github.sevntu.checkstyle.checks.design;
   
   import java.util.*;
   
   public class InputPublicReferenceToPrivateTypeCheck12 {
       private interface PrivateInner{
           public String name = "Private inner";
       }   
       public interface PublicInner{
          public String name="Public inner";
      }   
      
      public Set<? super PrivateInner> returnPrivate(){   //WARNING
          return new HashSet<PrivateInner>();
      }
      protected Set<? extends PublicInner> returnPublic(){  //OK
          return new HashSet<PublicInner>();
      }
      public Set<PrivateInner> returnPrivate5(){  //WARNING
          return new TreeSet<PrivateInner>();
      }
  }