you want something like ``` return parents.flatMap...

# rx

[jw]

you want something like

return parents.flatMapIterable { it }
    .concatMap { parent -> Single.zip(getFirst(parent), getSecond(parent), { first, second -> parent.copy(first = first, second = second) }) }
    .toList()

[rakeeb]

yep! makes sense, thanks Jake 🙂