NBSpaces.fromJson constructor Null safety

Implementation

NBSpaces.fromJson(Map<String, dynamic> json) {
  _d0 = json['0'];
  _d1 = json['1'];
  _d2 = json['2'];
  _d3 = json['3'];
  _d4 = json['4'];
  _d5 = json['5'];
  _d6 = json['6'];
  _d7 = json['7'];
  _d8 = json['8'];
  _d9 = json['9'];
  _d10 = json['10'];
  _d12 = json['12'];
  _d16 = json['16'];
  _d20 = json['20'];
  _d24 = json['24'];
  _d32 = json['32'];
  _d40 = json['40'];
  _d48 = json['48'];
  _d56 = json['56'];
  _d64 = json['64'];
  _d72 = json['72'];
  _d80 = json['80'];
  _d96 = json['96'];
  _d05 = json['0.5'];
  _d15 = json['1.5'];
  _d25 = json['2.5'];
  _d35 = json['3.5'];
}