code: def search_index_path(self, index=None, **options):
          
          if not self.yz_wm_index:
              raise RiakError("Yokozuna search is unsupported by this Riak node")
          if index:
              quote_plus(index)
          return mkpath(self.yz_wm_index, "index", index, **options)
docs: Builds a Yokozuna search index URL.
  
          :param index: optional name of a yz index
          :type index: string
          :param options: optional list of additional arguments
          :type index: dict
          :rtype URL string