Inject Functions: 2

DoggoStash.kt

interface TreatFactory {
  fun getTreats(): Treats
}

class Petco: TreatFactory {
  fun getTreats(): Treats {
    // Details of how to get to Petco, 
    // what aisle the treats are on, 
    // what treats they carry that doggo 
    // likes, etc.
  }
}

data class DoggoStash(
  val leash: Leash, 
  val waterBowl: WaterBowl, 
  val bed: Bed, 
  val treatFactory: TreatFactory)

fun proceedOnRoadTrip(doggoStash: DoggoStash) {
  getDoggoLeashedUp(doggoStash.leash)
  packupWaterBowl(doggoStash.waterBowl)
  setupBedInBackSeat(doggoStash.bed)
  startDriving()
  stopForTreats(doggoStash.treatFactory)
}

val leash = DoggoLeash()
val waterBowl = WaterBowl()
val bed = Bed()
val treatFactory = Petco()
val doggoStash = DoggoStash(leash, waterBowl, bed, treatFactory)
proceedOnRoadTrip(doggoStash)