anchor.diff:  import 'dart:async';
  +import 'dart:math';
   import 'dart:typed_data';
   import 'dart:ui' as ui;
   
  
positive.code:       ),
        _ChartData(
          'Blocked',
          stats.hourlyBlocked / 8.0,
          const Color(0xffff3b30),
          ui.Gradient.sweep(
            const Offset(0.5, 0.5),
  
negative.code:     data = [
        _ChartData(
          'All',
          max((stats.rateTotal) / 1.0, 20),
          const Color(0xff808080),
          ui.Gradient.sweep(
            const Offset(0.5, 0.5),
  