PyCharm does not suggest methods for Appium Python client

Selenium WebDriver can.

e.g.

```
self.driver. find_element_by_accessibility_id('xxxx') # When `.` is inputted, PyCharm should suggest `click` etc
self.driver. find_element_by_xpath('xxxx') # When `.` is inputted, PyCharm suggests `click` etc. selenium webdriver has it
```

I'm not sure the logic of PyCharm yet