code: def real_sound_match_abstract_sound(self, abstract_pos: AbstractPosition) -> bool:
          
          assert isinstance(abstract_pos, AbstractPosition)
          if self.before is not None and self.after is not None:
              return self.position == abstract_pos.position and self.before.match_list(abstract_pos.before) and \
                     self.after.match_list(abstract_pos.after)
          elif self.before is None and self.after is None:
              return self.position == abstract_pos.position
          elif self.before is None:
              return self.position == abstract_pos.position and self.after.match_list(abstract_pos.after)
          else:
              return self.position == abstract_pos.position and self.before.match_list(abstract_pos.before)
docs: If an observed position
          :param abstract_pos:
          :return: