test.kt

 val saleMap = listOf("foo" to 1)

val smsToGen = listOf(1)

val result: List<Pair<String, Int>> = smsToGen.mapNotNull { sms ->
  val found = saleMap.find { it.second == sms }

  if (found == null) {
     logger.debug("adfs")
  }
  found
}