import 'package:ui/ffi/lib_polaris_boot_stub.dart' if (dart.library.html) 'package:ui/ffi/entry/libpolaris_boot_browser.dart' if (dart.library.io) 'package:ui/ffi/entry/libpolaris_boot_native.dart'; abstract class LibPolarisBoot { static LibPolarisBoot? _instance; static LibPolarisBoot get instance { _instance ??= LibPolarisBoot(); return _instance!; } factory LibPolarisBoot() => create(); Future start(String cfg); Future stop(); }