          logger.debug("Updated landmarks_xy: %s", update_count)
  
  
  class Thumbnails():
      """ Thumbnail images stored in the alignments file.
  
      The thumbnails are stored as low resolution (64px), low quality jpg in the alignments file
 
</s> remove _VERSION = 2.1
 </s> add _VERSION = 2.2
    # Masks not containing the stored_centering parameters. Prior to this implementation all masks
    # were stored with face centering
    def _update_mask_centering(self):
        update_count = 0
        for val in self._data.values():
            for alignment in val["faces"]:
                for mask in alignment["mask"].values():
                    mask["stored_centering"] = "face"
        logger.debug("Updated legacy mask centering: %s", update_count)

          logger.debug("Updated landmarks_xy: %s", update_count)
  
    # Masks not containing the stored_centering parameters. Prior to this implementation all masks
    # were stored with face centering
    def _update_mask_centering(self):
        update_count = 0
        for val in self._data.values():
            for alignment in val["faces"]:
                for mask in alignment["mask"].values():
                    mask["stored_centering"] = "face"
        logger.debug("Updated legacy mask centering: %s", update_count)

  
  class Thumbnails():
      """ Thumbnail images stored in the alignments file.
  
      The thumbnails are stored as low resolution (64px), low quality jpg in the alignments file
keep add keep keep keep keep keep
 Update mask centering parameter into legacy alignments 
lib/align/alignments.py