def get_resources(cls):
        """Returns Ext Resources."""
        plural_mappings = resource_helper.build_plural_mappings(
            {}, RESOURCE_ATTRIBUTE_MAP)
        if NEUTRON_VERSION.version[0] <= NEUTRON_NEWTON_VERSION.version[0]:
            attr.PLURALS.update(plural_mappings)
        return resource_helper.build_resource_info(plural_mappings,
                                                   RESOURCE_ATTRIBUTE_MAP,
                                                   bc.constants.L3)