code: @Nonnull
      public BugInstance addClass(ClassNode classNode) {
          String dottedClassName = ClassName.toDottedClassName(classNode.name);
          ClassAnnotation classAnnotation = new ClassAnnotation(dottedClassName);
          add(classAnnotation);
          return this;
      }
docs: Add a class annotation for the classNode.
  
  @param classNode
  the ASM visitor
  @return this object