Parsing JSON with Dart

I want to be able to parse a string to an object that I can access using the dot notation e.g. myobject.property, instead of the array notation e.g. myobject['property']. The array notation works fine. Here's what I have so far.

I have some XML:

<level1 name="level1name">
  <level2 type="level2Type">
    <entry>level2entry</entry>
    <entry>level2entry</entry>
  </level2>
</level1>

Which converts to the JSON:

{
  "level1": {
    "name": "level1name",
    "level2": {
      "type": "level2Type",
      "entry": [
        "level2entry",
        "level2entry"
      ]
    }
  }
}

I have the following Dart code:

Object jsonObject = JSON.parse("""{
      "level1": {
        "name": "level1name",
        "level2": {
          "type": "level2Type",
          "entry": [
            "level2entry",
            "level2entry"
          ]
        }
      }
    }
""");

  print("my test 1 == ${jsonObject}");
  print("my test 2 == ${jsonObject['level1']}");
  print("my test 3 == ${jsonObject['level1']['name']}");

which produce the (desired) output:

my test 1 == {level1: {name: level1name, level2: {type: level2Type, entry: [level2entry, level2entry]}}}
my test 2 == {name: level1name, level2: {type: level2Type, entry: [level2entry, level2entry]}}
my test 3 == level1name

But when I try:

print("my test 1 == ${jsonObject.level1}");

I get the following:

Exception: NoSuchMethodException : method not found: 'get:level1'
Receiver: {level1: {name: level1name, level2: {type: level2Type, entry: [level2entry, level2entry]}}}
Arguments: []
Stack Trace:  0. Function: 'Object.noSuchMethod' url: 'bootstrap' line:717 col:3

Ideally, I want an object that I can access using the dot notation and without the compiler giving warning about Object n