Exclude root folders?

[p8R]

VS Code allows us to add several root folders to the workspace. Is there any way to exclude such a root folder from parsing?
In the extension description about only and excludeFolders config settings you have written:

Each item is a path under the root folder. For example: ...

It seems to me, that currently all root folders are included in search. It would be great to have an option to exclude some of them. For instance: while working on a new app version, I have one root folder with codes for new app and another with codes for old version. I'm interested only in TODOs for new version, but extension parses all codes from both root folders...