drift method
How far id has drifted, or null if nothing was declared for it.
A read: it plans and runs nothing. A node declared by a blueprint is asked
directly and answers in changes; one declared by steps is planned
Hub-side from its advertised capabilities and answers in actions.
Implementation
Future<Drift?> drift(String id) async {
final json = await _optional(() => get('/nodes/$id/drift'));
return json == null ? null : Drift.fromJson(json);
}