systemLocale property Null safety
The system's locale, as obtained from the window.navigator.language or other operating system mechanism. Note that due to system limitations this is not automatically set, and must be set by importing one of intl_browser.dart or intl_standalone.dart and calling findSystemLocale().
static String get systemLocale => global_state.systemLocale;
static set systemLocale(String locale) => global_state.systemLocale = locale;