code: public Photosets getList(String userId, String primaryPhotoExtras) throws FlickrException {
          return getList(userId, 0, 0, primaryPhotoExtras);
      }
docs: Get a list of all photosets for the specified user.
  
  This method does not require authentication. But to get a Photoset into the list, that contains just private photos, the call needs to be authenticated.
  
  @param userId
  The User id
  @param primaryPhotoExtras
  A comma-delimited list of extra information to fetch for the primary photo
  @return The Photosets collection
  @throws FlickrException