useId method Null safety

dynamic useId(
  1. dynamic id,
  2. JsonSchema scheme
)

Implementation

dynamic useId(dynamic id, JsonSchema scheme) => map(
      ref: (_) => id,
      union: (_) => {
        'id': id,
        'type': scheme.name,
      },
      // orElse: () => throw StateError("Can't getEntity on $runtimeType"),
    );