import kotlin.test.*
import java.util.*

fun main(args: Array<String>) {
//sampleStart
val map = mapOf("x" to "value A", "y" to "value B")
val props = map.toProperties()

println(props.getProperty("x")) // value A
println(props.getProperty("y", "fail")) // value B
println(props.getProperty("z", "fail")) // fail
//sampleEnd
}