How to link a Swift Package Manager native module with a 3rd party framework on OSX

so its not clear at all how to specify a 3rdparty.framework in the link line of the SPM module map. Anyone have an example that works? And three cheers for amazingly well documented tools!

module DudeNative [system] {
   header "/Library/Frameworks/DudeNative.framework/Versions/A/Headers/DudeNative.h"
   link "DudeNative"
   export *
}