code: def merchant_support_email(self, merchant_support_email):
          
  
          if merchant_support_email is None:
              raise ValueError("Invalid value for `merchant_support_email`, must not be `None`")
          if len(merchant_support_email) > 254:
              raise ValueError("Invalid value for `merchant_support_email`, length must be less than `254`")
  
          self._merchant_support_email = merchant_support_email
docs: Sets the merchant_support_email of this CreateCheckoutRequest.
          The email address to display on the Square Checkout confirmation page and confirmation email that the buyer can use to contact the merchant.  If this value is not set, the confirmation page and email will display the primary email address associated with the merchant's Square account.  Default: none; only exists if explicitly set.
  
          :param merchant_support_email: The merchant_support_email of this CreateCheckoutRequest.
          :type: str