获取联系人的分组

categories参数返回值为null 如何才能拿到分组信息

{
"id": 32,
"rawId": null,
"target": 0,
"displayName": "测试",
"name": {
"familyName": "测",
"givenName": "试",
"formatted": "试 测 "
},
"nickname": null,
"phoneNumbers": [{
"id": "97",
"pref": false,
"value": "188 8888 8888",
"type": "mobile"
}],
"emails": [{
"id": "101",
"pref": false,
"value": "qq.com",
"type": "work"
}],
"addresses": [],
"ims": [],
"organizations": [],
"birthday": null,
"note": null,
"photos": [],
"categories": null,
"urls": []
}