anchor.diff:      required this.shade1000,
     });
   
  -  _TonalRange._fromList(List<int> colors)
  +  TonalRange._fromList(List<int> colors)
         : shade0 = Color(colors[0]),
           shade10 = Color(colors[1]),
           shade50 = Color(colors[2]),
  
positive.code: 
  import 'package:flutter/foundation.dart';
  
  /// Respresents a Material You tonal palette, consisting of 5 tonal
  /// ranges.
  ///
  /// TODO(guidezpl): expand explanation, add screenshot, link to spec
  class TonalPalette {
  
negative.code: 
    @override
    bool operator ==(Object other) {
      return other is TonalRange && listEquals(allShades, other.allShades);
    }
  
    @override
  