code: def xformer(signature):
      
  
      funcs = [f for (f, _) in xformers(signature)]
  
      def the_func(objects):
          """
          Returns the a list of objects, transformed.
  
          :param objects: a list of objects
          :type objects: list of object
  
          :returns: transformed objects
          :rtype: list of object (in dbus types)
          """
          if len(objects) != len(funcs):
              raise IntoDPValueError(
                  objects,
                  "objects",
                  "must have exactly %u items, has %u" % \
                    (len(funcs), len(objects))
              )
          return [x for (x, _) in (f(a) for (f, a) in zip(funcs, objects))]
  
      return the_func
docs: Returns a transformer function for the given signature.
  
      :param str signature: a dbus signature
      :returns: a function to transform a list of objects to inhabit the signature
      :rtype: (list of object) -> (list of object)