909-
910- // First increment creates the entry with the delta value
911: let result = dict.increment("counter", 1).expect("increment");
--
931-
932- // Increment
933: let result = dict.increment("counter", 5).expect("increment");
--
935-
936- // Negative increment (decrement)
937: let result = dict.increment("counter", -3).expect("decrement");
--
1048-
1049- // fetch_add returns old value
1050: let old = dict.fetch_add("counter", 5).expect("fetch_add");
--
1052-
1053- // Verify new value
1054: let new_val = dict.increment("counter", 0).expect("read");