>     DummyObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
>   ․ DummyObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
207a210,211
>     SimpleObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
>   ․ SimpleObjectStore .trans(v, p, u) -> {v, r, eff} should handle transformation that results in null
245c249
<   121 passing (404ms)
---
>   123 passing (402ms)