is
Returns true if this char sequence is not empty and contains some characters except of whitespace characters.
Samples
import samples.*
import java.util.Locale
import kotlin.test.*
fun main() {
//sampleStart
fun validateName(name: String): String {
require(name.isNotBlank()) { "Name cannot be blank" }
return name
}
assertPrints(validateName("Adam"), "Adam")
assertFails { validateName("") }
assertFails { validateName(" \t\n") }
//sampleEnd
}