code: def _validate_hands(hands, missing):
      '''
      Validates hands, based on values that
      are supposed to be missing from them.
  
      :param list hands: list of Hand objects to validate
      :param list missing: list of sets that indicate the values
                           that are supposed to be missing from
                           the respective Hand objects
      :return: True if no Hand objects contain values that they
               are supposed to be missing; False otherwise
      '''
      for h, m in zip(hands, missing):
          for value in m:
              if dominoes.hand.contains_value(h, value):
                  return False
  
      return Truf _validate_hands(hands, missing):
      '''
      Validates hands, based on values that
      are supposed to be missing from them.
  
      :param list hands: list of Hand objects to validate
      :param list missing: list of sets that indicate the values
                           that are supposed to be missing from
                           the respective Hand objects
      :return: True if no Hand objects contain values that they
               are supposed to be missing; False otherwise
      '''
      for h, m in zip(hands, missing):
          for value in m:
              if dominoes.hand.contains_value(h, value):
                  return False
  
      return True
docs: Validates hands, based on values that
      are supposed to be missing from them.
  
      :param list hands: list of Hand objects to validate
      :param list missing: list of sets that indicate the values
                           that are supposed to be missing from
                           the respective Hand objects
      :return: True if no Hand objects contain values that they
               are supposed to be missing; False otherwise