code: def addLookupReference(
      feature, lookup, script=None, languages=None, exclude_dflt=False
  ):
      
      return addLookupReferences(
          feature,
          (lookup,),
          script=script,
          languages=languages,
          exclude_dflt=exclude_dflt,
      )
docs: Shortcut for addLookupReferences, but for a single lookup.