code: def get_all_role_config_groups(resource_root, service_name,
      cluster_name="default"):
    
    return call(resource_root.get,
        _get_role_config_groups_path(cluster_name, service_name),
        ApiRoleConfigGroup, True, api_version=3)
docs: Get all role config groups in the specified service.
    @param resource_root: The root Resource object.
    @param service_name: Service name.
    @param cluster_name: Cluster name.
    @return: A list of ApiRoleConfigGroup objects.
    @since: API v3