sample_enviroment command flutter run --dart-define=DEFINEEXAMPLE_APP_NAME=soft.prod --dart-define=DEFINEEXAMPLE_APP_SUFFIX=prod hint https://medium.com/@tatsu.ukraine/flutter-2-2-dart-defines-and-breaking-changes-here-we-go-again-ce40cfea74fd?source=user_profile---------0------------------------------- https://github.com/TatsuUkraine/flutter_define_example