traverse

inline fun <B> traverse(fa: (A) -> Iterable<B>): List<Option<B>>(source)
inline fun <AA, B> traverse(fa: (A) -> Either<AA, B>): Either<AA, Option<B>>(source)
inline fun <AA, B> traverse(fa: (A) -> Validated<AA, B>): Validated<AA, Option<B>>(source)