code: public TagsForUser getListUserPopular(String userId, Integer count) throws JinxException {
      Map<String, String> params = new TreeMap<>();
      params.put("method", "flickr.tags.getListUserPopular");
      if (!JinxUtils.isNullOrEmpty(userId)) {
        params.put("user_id", userId);
      }
      if (count != null) {
        params.put("count", count.toString());
      }
      return jinx.flickrGet(params, TagsForUser.class);
    }
docs: Get the popular tags for a given user (or the currently logged in user).
  
  This method does not require authentication.
  
  @param userId NSID of the user to fetch the tag list for. If this argument is not
  specified, the currently logged in user (if any) is assumed. Optional.
  @param count  number of popular tags to return. defaults to 10 when this argument is not present. Optional.
  @return popular tags for the given user.
  @throws JinxException if there are any errors.
  @see <a href="https://www.flickr.com/services/api/flickr.tags.getListUserPopular.html">flickr.tags.getListUserPopular</a>