code: public People getList(String photoId) throws JinxException {
      JinxUtils.validateParams(photoId);
      Map<String, String> params = new TreeMap<>();
      params.put("method", "flickr.photos.people.getList");
      params.put("photo_id", photoId);
      return jinx.flickrGet(params, People.class, false);
    }
docs: Get a list of people in a given photo.
  <br>
  This method does not require authentication.
  <br>
  
  @param photoId (Required) The id of the photo to get a list of people for.
  @return list of people in the photo.
  @throws JinxException if any required parameters are missing, or if there are any errors.
  @see <a href="https://www.flickr.com/services/api/flickr.photos.people.getList.html">flickr.photos.people.getList</a>