I tried this function to get a filtered list of pharmacies based on medication. However, I’m not sure if my implementation is correct. Could someone please review my approach and provide feedback or suggestions for improvement?

Future<List<DocumentSnapshot>> filterByMedication(Stream<List<DocumentSnapshot>> pharmaciesStream, String medication) async {
    List<DocumentSnapshot> filteredPharmacies = [];

    await for (var pharmacies in pharmaciesStream) {
      for (var pharmacy in pharmacies) {
        var drugsCollection = pharmacy.reference.collection('Drugs');
        var drugsSnapshot = await drugsCollection.where('Name', isEqualTo: medication).get();

        if (drugsSnapshot.docs.isNotEmpty) {
          filteredPharmacies.add(pharmacy);
        }
      }
    }

    return filteredPharmacies;
}