initializeCore method
Implementation
@override
Future<List<PigeonInitializeResponse?>> initializeCore() async {
return [
PigeonInitializeResponse(
name: defaultFirebaseAppName,
options: PigeonFirebaseOptions(
apiKey: '123',
projectId: '123',
appId: '123',
messagingSenderId: '123',
),
pluginConstants: {},
),
];
}