flutter run --dart-define=API_KEY_ID=SOME_KEY --dart-define=SOME_CONDITIONS_PATH=/_path --dart-define=IS_STAGE=true --dart-define=IS_PROD=false ...

/** example struct */ struct whatever { uint8_t someNumber; /**< a number */ union { char ch; /**< a char in the union */ uint8_t num; /**< a number in the union ...