@property
def is_billing_to_credit_card(self) -> bool:
    return ((self._item_name == self.ITEM_NAME_BILLING_TO_CREDIT_CARD) and (self.price is None) and (self.number is None) and (self.subtotal_price_item is None) and (self.total_order is None) and (self.credit_card_billing_date != '') and (self.credit_card_billing_amount != ''))
@property
def is_billing_to_credit_card(self) -> bool:
    return ((self._item_name == self.ITEM_NAME_BILLING_TO_CREDIT_CARD) and (self.price is None) and (self.number is None) and (self.subtotal_price_item is None) and (self.total_order is None) and (self.credit_card_billing_date != ) and (self.credit_card_billing_amount != ))