code: def fields(self):
          '''Return a tuple of ordered fields for this :class:`ColumnTS`.'''
          key = self.id + ':fields'
          encoding = self.client.encoding
          return tuple(sorted((f.decode(encoding)
                               for f in self.client.smembers(key)))f fields(self):
          '''Return a tuple of ordered fields for this :class:`ColumnTS`.'''
          key = self.id + ':fields'
          encoding = self.client.encoding
          return tuple(sorted((f.decode(encoding)
                               for f in self.client.smembers(key))))
docs: Return a tuple of ordered fields for this :class:`ColumnTS`.