非同期 - [https://dart.dev/effective-dart/usage#asynchrony](https://dart.dev/effective-dart/usage#asynchrony) - async関数の方はFuture<T>になる - FutureOr<T>: Future<T>かTどちらかを返す方 C FFI - [[Dart FFI]] - [https://dart.dev/interop/c-interop](https://dart.dev/interop/c-interop) Effective Dart - [https://dart.dev/effective-dart/usage#error-handling](https://dart.dev/effective-dart/usage#error-handling)