firstOrNull<V>  function 
 
Returns first element in array, if it's empty returns null.
Implementation
V? firstOrNull<V>(Iterable<V> list) {
  if (list.isEmpty) return null;
  return list.first;
}Returns first element in array, if it's empty returns null.
V? firstOrNull<V>(Iterable<V> list) {
  if (list.isEmpty) return null;
  return list.first;
}