'Returns Ext Resources.'

@classmethod
def get_resources(cls):

    plural_mappings = resource_helper.build_plural_mappings({}, RESOURCE_ATTRIBUTE_MAP)
    action_map = {'router': {'add_router_interface': 'PUT', 'remove_router_interface': 'PUT'}}
    return resource_helper.build_resource_info(plural_mappings, RESOURCE_ATTRIBUTE_MAP, constants.L3, action_map=action_map, register_quota=True)
