flutter how to get data from another class code example

Example 1: pass string to a provider flutter

_secondPage(BuildContext context, Widget page) async {    final dataFromSecondPage = await Navigator.push(  context,  MaterialPageRoute(builder: (context) => page),  ) as Data;  // Here we have the data from the second screen  data.counter = dataFromSecondPage.counter;  data.dateTime = dataFromSecondPage.dateTime;  data.text = dataFromSecondPage.text;}

Example 2: pass data from one provider model to anothe

GetIt locator = GetIt();locator.registerLazySingleton(() => Api());locator.registerLazySingleton(() => AuthenticationService());locator.registerLazySingleton(() => LoginModel());// Usagevar api = locator()