var selectedObjects []runtime.Object
	for _, obj := range objs {
		elem, ok := obj.(*storeElement)
		if !ok {
			return fmt.Errorf("non *storeElement returned from storage: %v", obj)
		}
		if filter(elem.Key, elem.Labels, elem.Fields) {
			selectedObjects = append(selectedObjects, elem.Object)
		}
	}
	if len(selectedObjects) == 0 {