FireStore: Need a funtion which can get all List<data> of a firestore collection from cache without make server request even divice is online

[samithe7]

now we can get all data from a firestore collection . when app is online data came from server but when app is offline data came from cache . I nead a funtion collectionFromCache which all time get all firestore collection data from cache even app is offline

class Men {
  static const String idName = 'news';
  final String name;
  final String phote;
  final int age;

  const Men({
    required this.name,
    required this.phote,
    required this.age,
  });

  factory Men.fromFB(
    DocumentSnapshot<Map<String, dynamic>> snapshot,
  ) {
    final data = snapshot.data();

    return Men(
      name: data?['name'] as String,
      phote: data?['phote'] as String,
      age: data?['age'] as int,
    );
  }
}




// now which  i use  

   final  menData= FutureProvider<List<Men>>((ref) async {
    final data =
        await FirebaseFirestore.instance.collection('world').get();

    return data.docs.map(Men.fromFB).toList();
  });




// want to  use   
//  

   final  menData = FutureProvider<List<Men>>((ref) async {
    final data =
        await FirebaseFirestore.instance.collectionFromCache ('world').get();

    return data.docs.map(Men.fromFB).toList();
  });

[samithe7]

final snapshot = await documentReference.get(GetOptions(source: Source.serverAndCache));

this solve my issue . thanks
but firebase Documentation how to handle cache is very poor