anchor.diff:  
   @pragma("vm:entry-point")
   class _Uint32List extends _TypedList
  -    with _IntListMixin<Uint32List>
  +    with _IntListMixin, _TypedIntListMixin<Uint32List>
       implements Uint32List {
     factory _Uint32List._uninstantiable() {
       throw "Unreachable";
  
positive.code: 
  @pragma("vm:entry-point")
  class _Float64List extends _TypedList
      with _DoubleListMixin<Float64List>
      implements Float64List {
    factory _Float64List._uninstantiable() {
      throw "Unreachable";
  
negative.code: 
  @pragma("vm:entry-point")
  class _ExternalUint32Array extends _TypedList
      with _IntListMixin, _TypedIntListMixin<Uint32List>
      implements Uint32List {
    factory _ExternalUint32Array._uninstantiable() {
      throw "Unreachable";
  