code: public Contacts getListRecentlyUploaded(Date dateLastUpload, JinxConstants.Contacts filter) throws JinxException {
      Map<String, String> params = new TreeMap<>();
      params.put("method", "flickr.contacts.getListRecentlyUploaded");
      if (dateLastUpload != null) {
        params.put("date_lastupload", JinxUtils.formatDateAsUnixTimestamp(dateLastUpload));
      }
      if (filter != null) {
        params.put("filter", filter.toString());
      }
      return jinx.flickrGet(params, Contacts.class);
    }
docs: Return a list of contacts for a user who have recently uploaded photos along with the total count of photos uploaded.
  <br>
  Flickr documentation states:
  "This method is still considered experimental. We don't plan for it to change or to go away but so long as this notice
  is present you should write your code accordingly."
  <br>
  This method requires authentication with 'read' permission.
  <br>
  
  @param dateLastUpload Optional. Limits the resultset to contacts that have uploaded photos since this date. The default offset is (1) hour and the maximum (24) hours.
  @param filter         Optional. Limit the result set to all contacts or only those who are friends or family.
  @return object containing contacts matching the parameters.
  @throws JinxException if there are any errors.
  @see <a href="https://www.flickr.com/services/api/flickr.contacts.getListRecentlyUploaded.html">flickr.contacts.getListRecentlyUploaded</a>