code: def pre_populate_buyer_email(self, pre_populate_buyer_email):
          
  
          if pre_populate_buyer_email is None:
              raise ValueError("Invalid value for `pre_populate_buyer_email`, must not be `None`")
          if len(pre_populate_buyer_email) > 254:
              raise ValueError("Invalid value for `pre_populate_buyer_email`, length must be less than `254`")
  
          self._pre_populate_buyer_email = pre_populate_buyer_email
docs: Sets the pre_populate_buyer_email of this CreateCheckoutRequest.
          If provided, the buyer's email is pre-populated on the checkout page as an editable text field.  Default: none; only exists if explicitly set.
  
          :param pre_populate_buyer_email: The pre_populate_buyer_email of this CreateCheckoutRequest.
          :type: str