docs: def release_savepoint(self, savepoint):
          """Releases the given savepoint.
  
          :param savepoint: the name of the savepoint to release
          :raise: pydbal.exception.DBALConnectionError
          """
          if not self._platform.is_savepoints_supported():
              raise DBALConnectionError.savepoints_not_supported()
          if self._platform.is_release_savepoints_supported():
              self.ensure_connected()
              self._platform.release_savepoint(savepoint)