code: def fetch(self, value_obj=None):
          ''' Fetch the next two values '''
          val = None
          try:
              val = next(self.__iterable)
          except StopIteration:
              return None
          if value_obj is None:
              value_obj = Value(value=val)
          else:
              value_obj.value = val
          return value_obf fetch(self, value_obj=None):
          ''' Fetch the next two values '''
          val = None
          try:
              val = next(self.__iterable)
          except StopIteration:
              return None
          if value_obj is None:
              value_obj = Value(value=val)
          else:
              value_obj.value = val
          return value_obj
docs: Fetch the next two values