dart-so-question

main.dart

import 'dart:convert';

String toJson(dynamic object) {
  var encoder = new JsonEncoder.withIndent("     ");
  return encoder.convert(object);
}

dynamic fromJson(String jsonString) {
  return json.decode(jsonString);
}

void main() {
  Map<String, String> data = {"hello": "world"};
  String jsonString = toJson(data);
  data = fromJson(jsonString);
  print(data);
}