检查密钥是否存在于多维json响应中[颤动] [Dart]

import 'dart:convert';

void main() {
  String jsonResponse = '''
    {
      "data": {
        "users": [
          {
            "id": 1,
            "name": "John"
          },
          {
            "id": 2,
            "name": "Jane"
          }
        ]
      }
    }
  ''';

  Map<String, dynamic> response = jsonDecode(jsonResponse);

  bool isKeyExist = checkKeyExist(response, "name");
  print("Is key 'name' exist? $isKeyExist");
}

bool checkKeyExist(Map<String, dynamic> json, String key) {
  if (json.containsKey(key)) {
    return true;
  } else {
    for (var value in json.values) {
      if (value is Map) {
        if (checkKeyExist(value, key)) {
          return true;
        }
      }
    }
  }
  return false;
}