The PR got merged on 30 Jul 2019: https://github.com/fuse-open/fuselibs/commits/master
Not sure if fuse-sdk has the latest from fuselibs but if it does, then you should have the notification channel without setting anything (it sets a default channel).
If you don’t have that happening, then the PR probably didn’t make it to the fuse-sdk yet, in which case, you need to compile with the latest fuselibs repo, instead of the one from the fuse-sdk.
You can simply add a “.unoconfig” file to the root of your project with the line:
Packages.SourcePaths += [path to your local repo]/fuselibs/Source
Then run “uno doctor” to make sure it compiles with the fuselibs source you’re pointing to.