List<E>.from constructor Null safety
Creates a list containing all elements.
The Iterator of elements provides the order of the elements.
All the elements should be instances of E.
The elements iterable itself may have any element type, so this
constructor can be used to down-cast a List, for example as:
List<SuperType> superList = ...;
List<SubType> subList =
new List<SubType>.from(superList.whereType<SubType>());
This constructor creates a growable list when growable is true;
otherwise, it returns a fixed-length list.
Implementation
external factory List.from(Iterable elements, {bool growable = true});