options abstract method
POST /{resource}/options — the options for a select whose list /schema
refused to inline.
values carries the form's current state because options depend on
siblings: a pilot measured a dependent picker narrowing 6 -> 2 -> 1 as its
parent changed. Sending an empty map makes every dependent select wrong.
Implementation
Future<OptionsPage> options(
String resourceKey, {
required String field,
Object? recordId,
required Map<String, dynamic> values,
required String query,
});