code: private List<String> defaultValue(Map<Class<? extends Annotation>, ParameterInfo<?>> annotations) {
      ParameterInfo<?> defaultInfo = annotations.get(DefaultValue.class);
      if (defaultInfo == null) {
        return Collections.emptyList();
      }
  
      DefaultValue defaultValue = defaultInfo.getAnnotation();
      return Collections.singletonList(defaultValue.value());
    }
docs: Returns a List of String created based on the {@link DefaultValue} if it is presented in the annotations Map.
  
  @return a List of String or an empty List if {@link DefaultValue} is not presented