{
  "results": [
    { 
      "text": "Group 1", 
      "children" : [
        {
            "id": "下拉1",
            "text": "下拉1"
        },
        {
            "id": "Option 1.2",
            "text": "Option 1.2"
            ,"selected": true
        }
      ]
    },
    { 
      "text": "Group 2", 
      "children" : [
        {
            "id": 3,
            "text": "Option 2.1"
        },
        {
            "id": 4,
            "text": "Option 2.2"
        }
      ]
    }
  ],
  "pagination": {
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