如何在flutter中从JSON文件中获取所有命令id？

[
  {
    "id": 1,
    "name": "Command 1",
    "description": "This is command 1"
  },
  {
    "id": 2,
    "name": "Command 2",
    "description": "This is command 2"
  },
  {
    "id": 3,
    "name": "Command 3",
    "description": "This is command 3"
  }
]

import 'dart:convert';

Future<List<int>> getCommandIds() async {
  String jsonString = await rootBundle.loadString('assets/commands.json');
  List<dynamic> jsonList = json.decode(jsonString);
  
  List<int> commandIds = [];
  for (var jsonItem in jsonList) {
    int id = jsonItem['id'];
    commandIds.add(id);
  }
  
  return commandIds;
}

List<int> ids = await getCommandIds();
print(ids); // 输出所有命令ID