werediver

void main() async {
  await variant1();
  variant2();
  print("xxx");
}

Future<void> variant1() async {
  final result = await y();
  // async gap
  print("y: $result");

werediver

void main() {
  print(f(true).map((value) => value + 1));
  print(f(false).map((value) => value + 1));
  
  print([1, 2, 3].map((value) => "x ${value + 1}"));
  print([].map((value) => value + 1));
}

// Methods like
// map, flatMap / expand, filter / where, firstWhere, reduce, fold