code: public Swagger2MarkupConfigBuilder withPropertyOrdering(Comparator<String> propertyOrdering) {
          Validate.notNull(propertyOrdering, "%s must not be null", "propertyOrdering");
  
          config.propertyOrderBy = OrderBy.CUSTOM;
          config.propertyOrdering = propertyOrdering;
          return this;
      }
docs: Specifies a custom comparator function to order properties.
  
  @param propertyOrdering property ordering
  @return this builder