How to add "undefined variable" os.sleep as exception for Diagnostics?

[GusarevKirill]

VS Code, Lua extension.

Hello. My lang is RU therefore sorry for mistakes in my question. If you do not understand me full, then let me know.

So, I have a problem with Diagnostics. Text of warning: Undefined field sleep.Lua Diagnostics.(undefined-field).
This warning appears when I use a function os.sleep(). This function is availaible on platform OpenComputers (Mod for Minecraft). Because I develop Lua apps for OpenComputers.

I already read a wiki, but I didn't find anything I needed. I read settings for this extension in VS Code and I found a parameters "Diagnostic: Disable" and "Diagnostic: Globals", may be these parameters can help me, but I have no idea how to use these :(((.

So Can I disable this warnings for "os.sleep"? How can I do this?
Thanks for any help. :)

[sumneko]

os.sleep is not in Lua's standard library, it should be added by your runtime environment.
You can create a file that will not be used and declare this function in it:

---@param num number
function os.sleep(num) end

[GusarevKirill]

Hello, thank you for answer!
But... Via definition a function only?
May be extension includes some whitelist for Diagnostics? :(
If I define this function in other file, should I hold this file opened? Or I can just close and forget?

[sumneko]

You may put it in your workspace, or use Lua.workspace.library

[GusarevKirill]

I will try to do something