Sets the domain_name of this RegisterDomainRequest.
        A domain name as described in RFC-1034 that will be registered with ApplePay

        :param domain_name: The domain_name of this RegisterDomainRequest.
        :type: str

def domain_name(self, domain_name):
        """
        Sets the domain_name of this RegisterDomainRequest.
        A domain name as described in RFC-1034 that will be registered with ApplePay

        :param domain_name: The domain_name of this RegisterDomainRequest.
        :type: str
        """

        if domain_name is None:
            raise ValueError("Invalid value for `domain_name`, must not be `None`")
        if len(domain_name) > 255:
            raise ValueError("Invalid value for `domain_name`, length must be less than `255`")
        if len(domain_name) < 1:
            raise ValueError("Invalid value for `domain_name`, length must be greater than or equal to `1`")

        self._domain_name = domain_name