How to use wmi client library?

I have built ‘openvas-smb’ project and got an openvas_wmiclient library. I see the file openvas_wmi_interface.h, but there are no any comments how to use it. The ‘doc’ folder has only binary usage information, but library. The target ‘make doc-full’ doesn’t exist.

I tried to see CLI utility source code (wmic.c) as an example. But it doesn’t use openvas_wmiclient library! It just uses functions directly, not from library.

So the question is:
Where can I find some usage guide or examples for openvas_wmiclient library?
(GitHub - greenbone/openvas-smb: SMB module for OpenVAS Scanner)