code: public Photo download(int maxWidth, int maxHeight, Param... extraParams) {
          image = place.getClient().downloadPhoto(this, maxWidth, maxHeight, extraParams);
          return this;
      }
docs: Downloads the photo and caches it within the photo.
  
  @param maxWidth    of photo
  @param maxHeight   of photo
  @param extraParams to append to request url
  @return this