code: def is_elementary_type(elem_type):
          
          if not oh.is_type(elem_type, bt.XmrType):
              return False
          if oh.is_type(elem_type, (bt.UVarintType, bt.IntType, mt.UnicodeType)):
              return True
          return False
docs: Returns True if the type is elementary - not versioned
          :param elem_type:
          :return: