最終更新:2022-03-09 (水) 05:08:30 (795d)
Dart/Stream.firstWhere
https://api.dart.dev/stable/2.14.0/dart-async/Stream/firstWhere.html
おなかすいた族!
https://api.dart.dev/stable/2.14.0/dart-async/Stream/firstWhere.html