code: protected Tag getModelTag(Class<?> modelClass) {
          if (modelClass.isAnnotationPresent(ApiModel.class)) {
              ApiModel annotation = modelClass.getAnnotation(ApiModel.class);
              Tag tag = new Tag();
              tag.setName(Optional.fromNullable(Strings.emptyToNull(annotation.name())).or(modelClass.getSimpleName()));
              tag.setDescription(translate(annotation.descriptionKey(), annotation.description()));
              return tag;
          }
  
          Tag tag = new Tag();
          tag.setName(modelClass.getName());
          return tag;
      }
docs: Returns the tag of the model.
  This ref is either explicitly named or it is generated from the model class name.
  
  @param modelClass
  @return the tag of the model