code: def _maybe_normalize(self, var):
          
          if self.normalize:
              try:
                  return self._norm.normalize(var)
              except HGVSUnsupportedOperationError as e:
                  _logger.warning(str(e) + "; returning unnormalized variant")
                  # fall through to return unnormalized variant
          return var
docs: normalize variant if requested, and ignore HGVSUnsupportedOperationError
          This is better than checking whether the variant is intronic because
          future UTAs will support LRG, which will enable checking intronic variants.