Data.fromJson constructor Null safety
Implementation
factory Data.fromJson(Map<String, dynamic> json) => Data(
nodes: List<Node>.from(json['nodes'].map((x) => Node.fromJson(x))),
);
factory Data.fromJson(Map<String, dynamic> json) => Data(
nodes: List<Node>.from(json['nodes'].map((x) => Node.fromJson(x))),
);