initialize method Null safety

Point initialize(Point newItem) native;

1. Dart
2. dart:svg
3. PointList
4. initialize method

PointList class

1. Properties
2. hashCode
3. length
4. numberOfItems
5. runtimeType
6. Methods
7. appendItem
8. clear
9. getItem
10. initialize
11. insertItemBefore
12. noSuchMethod
13. removeItem
14. replaceItem
15. toString
16. Operators
17. operator ==