import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
fun validateName(name: String): String {
    require(name.isNotBlank()) { "Name cannot be blank" }
    return name
}

println(validateName("Adam")) // Adam
// validateName("") //  will fail
// validateName("  \t\n") //  will fail
//sampleEnd
}