Create "Notification Service Extension" from post build script

Hi!
We are using a postbuild-script to modify our xcode project.

Works great, but now we need your help. We are trying to add a "Notification Service Extension"-target from code (see picture).



We can add a new xcode target by using PBXProject.AddAppExtension, but with this we only get a "normal" target, not a specific "Notification Service Extension"-one..

Reason why we want this done by code...

Create "Notification Service Extension" from post build script