nativeapi 0.5.7 does not compile on Dart 3.14 (beta): Isolate.create unshipped #22

Problem

With the Dart 3.14 beta SDK (3.14.0-315.3.beta, Flutter beta 3.50.0-0.3.pre), any program importing package:nativeapi/nativeapi.dart 0.5.7 fails to compile:

nativeapi-0.5.7/lib/src/run_native_app.dart:45:25: Error: Member not found: 'Isolate.create'.
    final app = Isolate.create(debugName: 'nativeapi');
                        ^^^^^^

It compiles with Dart 3.13.7 (stable).

Cause

Dart 3.14 unships the experimental isolate APIs that were accidentally exposed in Dart 3.13 (dart-lang/sdk#64285, dart:isolate section of the 3.14 CHANGELOG): Isolate.create, Isolate.runSync and Isolate.runEventLoopSync are removed from dart:isolate, and NativeCallable.isolateGroupBound is now gated behind the --experimental-shared-data VM flag. runNativeApp in lib/src/run_native_app.dart uses all four.

lib/nativeapi.dart exports src/run_native_app.dart on every non-web platform, so the file is compiled for every user of the library, including Flutter apps that never call runNativeApp. That also covers every user of package:window_manager/window_manager.dart 0.6.0, which re-exports package:nativeapi/nativeapi.dart (a show list does not stop the library from being compiled). Their tests fail to load on the beta channel.

Reproduction

pubspec.yaml:

name: nativeapi_repro
publish_to: none
environment:
  sdk: ^3.13.0
dependencies:
  nativeapi: 0.5.7

bin/main.dart:

import 'package:nativeapi/nativeapi.dart';

void main() {
  print(WindowManager.instance);
}

dart pub get
dart compile kernel bin/main.dart

Dart 3.14.0-315.3.beta: the error above. Dart 3.13.7: compiles.

Suggestion

Moving runNativeApp out of nativeapi.dart into its own library (for example package:nativeapi/run_native_app.dart) would let Flutter apps and window_manager compile on Dart 3.14 again. runNativeApp itself needs another approach on 3.14, since NativeCallable.isolateGroupBound now requires --experimental-shared-data.