Why 'combobox' mode doesn't work properly?

[markin-io]

Hello, my name is Igor. I really need to use antd TreeSelect component in 'combobox' mode.
It's not really comfortable to our users open dropdown, click on the search field and type text every time they want search in tree. They want enter text right into component's text input like in 'multiple' mode.

Digging into sources brought me here and I noticed that some parts of the code related to 'combobox' mode are commented and functional seems to be broken when I set 'combobox' prop to true.
I'm wondering why it doesn't work. Could you please give me some information about that? I'm gonna try fix it and publish Pull Request for this issue.
Thank you!

[yesmeck]

You can use Select component if you need combobox.

[yesmeck]

As I commented in ant-design/ant-design#9062 (comment)

[markin-io]

@yesmeck yes, thank you.