//show type is erased in runtime
// show reified

fun <T> checkTypeAtRuntime(item: Any){
    println("${item is T}")
}

fun main(){
    val names: MutableList<String> = mutableListOf("John", "Sarah", "Mark")
    val ages: MutableList<Int> = mutableListOf(1,2,3)

    checkTypeAtRuntime<String>("John")
    checkTypeAtRuntime<Int>("Sarah")
}