firstOrNull property
The first element, or null if the iterable is empty.
Implementation
T? get firstOrNull {
  var iterator = this.iterator;
  if (iterator.moveNext()) return iterator.current;
  return null;
}
The first element, or null if the iterable is empty.
T? get firstOrNull {
  var iterator = this.iterator;
  if (iterator.moveNext()) return iterator.current;
  return null;
}