createDefaultInstantAdapter method
Creates a fresh default adapter for an Instant view — the Instant
counterpart of createDefaultAdapter, returning a controller that also
implements NutrientInstantController so a bare NutrientInstantView
surfaces the Instant sync methods in onControllerReady.
Android and iOS override this. The base implementation throws so platforms without runtime Instant controls (Web configures Instant at load time) surface the gap — callers handle UnimplementedError.
Implementation
NutrientPlatformAdapter createDefaultInstantAdapter() =>
throw UnimplementedError(
'createDefaultInstantAdapter() has not been implemented for this '
'platform.',
);