code: def variation_name(self, variation_name):
          
  
          if variation_name is None:
              raise ValueError("Invalid value for `variation_name`, must not be `None`")
          if len(variation_name) > 255:
              raise ValueError("Invalid value for `variation_name`, length must be less than `255`")
  
          self._variation_name = variation_name
docs: Sets the variation_name of this OrderLineItem.
          The name of the variation applied to this line item.
  
          :param variation_name: The variation_name of this OrderLineItem.
          :type: str