code: def _cql_from_cass_type(cass_type):
      
      if issubclass(cass_type, types.ReversedType):
          return cass_type.subtypes[0].cql_parameterized_type()
      else:
          return cass_type.cql_parameterized_type()
docs: A string representation of the type for this column, such as "varchar"
      or "map<string, int>".