bandList method Null safety

Implementation

static List<double> bandList(Map<String, dynamic> map) {
  Map<String, dynamic> group = map["group"];
  Map<String, dynamic> total = map["total"];
  return [
    group["mean"].toDouble(),
    group["upper_band"].toDouble(),
    group["lower_band"].toDouble(),
    total["mean"].toDouble(),
    total["upper_band"].toDouble(),
    total["lower_band"].toDouble(),
  ];
}