Collection addition with Spread operator

spreadoperatorcollection.dart

void main() {
    var numbers = [1, 2, 3];
    var names = ["Smith", "Laxman"];
    List<int> nullList;
    List<int> getLostNumbers() => null;

    //This is long way
    print("\n\n\nLong Way");
    var list = List();
    list.addAll(numbers);
    list.addAll(names);
    //Hassale to add nullList
    list.addAll(nullList??[]);
    list.addAll(getLostNumbers()??[]);
    list.forEach(print);
    
    print("\n\n\nShort Way");
    //This is short way with easy null safe insertion
    var list1 = [...numbers, ...names, ...?nullList, ...?getLostNumbers()];                        
    list1.forEach(print);
}