```ucm
scratch/main> builtins.mergeio
```

```unison
test> pass = [Ok "Passed"]
```

```ucm
scratch/main> add
```

```unison
test> pass = [Ok "Passed"]
```

```ucm
scratch/main> add
scratch/main> test
```

```unison
> ImmutableArray.fromList [?a, ?b, ?c]
> ImmutableByteArray.fromBytes 0xs123456
```