poco库报错 ,a.double_click()双击提示NotImplementedError。double_click(a)提示Circular reference detected

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**(重要！问题分类)**
* 图像识别相关问题 -> https://github.com/AirtestProject/Airtest/issues
* 测试开发环境AirtestIDE使用问题 -> https://github.com/AirtestProject/AirtestIDE/issues
* 控件识别、树状结构、poco库报错 -> 此仓库

**描述问题bug**
调用双击报错

```
Traceback (most recent call last):
File "/Users/wjjn3033/dev/idestable/airtest/airtest/cli/runner.py", line 66, in runTest
File "/Users/wjjn3033/dev/idestable/venv_ide_qt511/lib/python3.6/site-packages/six.py", line 693, in reraise
File "/Users/wjjn3033/dev/idestable/airtest/airtest/cli/runner.py", line 62, in runTest
File "/Users/zhangchang/Desktop/airtest/111.air/untitled.air/untitled.py", line 11, in
poco("com.wodi.who:id/wechat_login").double_click()
File "/Users/wjjn3033/dev/idestable/poco/poco/proxy.py", line 23, in wrapped
File "/Users/wjjn3033/dev/idestable/poco/poco/proxy.py", line 349, in double_click
File "/Users/wjjn3033/dev/idestable/poco/poco/pocofw.py", line 256, in double_click
NotImplementedError
```

**复现步骤**
icon=poco("com.wodi.who:id/wechat_login")

icon.double_click()

**预期效果**
实现双击

**相关截图**
无
**python 版本:** `python3.6`

**poco 版本:** `1.0.70`
> poco版本通过`pip freeze`可以命令可以查到

**设备:**
- 型号: 小米max
- 系统: [e.g. Android 6.0]
- (别的信息)

**其他相关环境信息**
只在mac上