code: func Remember(index Index, keys []string, values []interface{}) {
  	for i, k := range keys {
  		index.Put(k, values[i])
  	}
  	err := index.NillableRet()
  	if err != nil {
  		log.Fatalf("Woah! %v", err)
  	}
  	if len(keys) > 0 && keys[0] == "a" {
  		index.Ellip("%d", 0, 1, 1, 2, 3)
  		index.Ellip("%d", 1, 3, 6, 10, 15)
  		index.EllipOnly("arg")
  	}
  }
docs: // A function that we will test that uses the above interface.
  // It takes a list of keys and values, and puts them in the index.