The transactional template id for this email

        :param value: The transactional template id for this email
        :type value: TemplateId

def template_id(self, value):
        """The transactional template id for this email

        :param value: The transactional template id for this email
        :type value: TemplateId
        """
        if isinstance(value, TemplateId):
            self._template_id = value
        else:
            self._template_id = TemplateId(value)