code: public String description() {
          if (description.length() == 0 && matchingField != null) {
  
              //check for javadoc comment of corresponding field.
              Comment comment = matchingField.comment();
              if (comment != null) {
                  return comment.commentText();
              }
          }
          return description;
      }
docs: Return the field comment. If there is no serialField comment, return
  javadoc comment of corresponding FieldDocImpl.