docs: def is_support_abstract_type(t):
      """FIXME: 3.5 only"""
      if hasattr(t, '__origin__') and t.__origin__:
          data_type = t.__origin__
      else:
          data_type = t
      abstract_types = {
          typing.Sequence,
          typing.List,
          typing.Set,
          typing.AbstractSet,
          typing.Mapping,
          typing.Dict,
      }
      return any(type_ is data_type for type_ in abstract_types)