update_usage_none()
{
	return 1 # backend-specific option doesn't exist
}

update_postprocess_none()
{
	:
}

update_first_set_param_none()
{
	: ${SUPPORT_XML_TYPE:=no}
}

update_last_set_param_none()
{
	:
}

update_sanity_none()
{
	return 0
}

update_none()
{
	:
}

update_access_db_none()
{
	:
}
