'Returns Ext Resources.'

@classmethod
def get_resources(cls):

    plugin = directory.get_plugin()
    params = RESOURCE_ATTRIBUTE_MAP['rbac_policies']
    collection_name = 'rbac-policies'
    resource_name = 'rbac_policy'
    resource_registry.register_resource_by_name(resource_name)
    controller = base.create_resource(collection_name, resource_name, plugin, params, allow_bulk=True, allow_pagination=False, allow_sorting=True)
    return [extensions.ResourceExtension(collection_name, controller, attr_map=params)]
