(region, service_id)
Get the URI for the service in a given region.

        :param six.text_type service_id: the ID of the service.
        :returns: URL to use if it exists, otherwise an empty string
        :rtype: six.text_type
Get the URI for the service in a given region.
Get the URI for the service in a given region .
def uri_for_service(region, service_id):  # pragma:nocover
        """
        Get the URI for the service in a given region.

        :param six.text_type service_id: the ID of the service.
        :returns: URL to use if it exists, otherwise an empty string
        :rtype: six.text_type
        """
def uri_for_service ( region , service_id ) : # pragma:nocover