Inner enum

Sample.java

public enum UpdateMode {
  UPDATE_SIMPLE_MODE(ConnectivityMode.WIFI, ConnectivityMode.ETHERNET),
  UPDATE_FAST_MODE(ConnectivityMode.ETHERNET)
}

public enum ConnectivityMode {
  WIFI,
  ETHERNET
}

// and then somewhere in code
switch (mUpdateMode.mConnectivityMode) {
  case ConnectivityMode.WIFI:
    // update simple via wifi
    break;
  case ConnectivityMode.ETHERNET:
    // update simple via ehternet
    break;
}

How to make it in Kotlin:

enum class Big(vararg val small: Small) {
    A(Small.A, Small.B), B(Small.B)
}
enum class Small {
    A, B
}

fun example() {
    val big = Big.A
    when {
        Small.A in big.small -> println("A")
        Small.B in big.small -> println("B")
    }
}