flatMap

inline fun <A, E, B> Outcome<E, A>.flatMap(f: (A) -> Outcome<E, B>): Outcome<E, B>(source)

FlatMap allows multiple Outcomes to be safely chained together, passing the value from the previous as input into the next function that produces an Outcome

fun <A, E, C> Outcome<E, A>.flatMap(f: (A) -> Outcome<E, C>): Outcome<E, C>

Present(5).flatMap {
  if (it < 5) {
    Present(it)
  } else if (it < 10) {
    Absent
  } else {
    Failure("Value too high")
  }
}