isNullOrEmpty

Returns true if this nullable char sequence is either null or empty.

inline fun CharSequence?.isNullOrEmpty(): Boolean(source)

fun main() {
    val text1: CharSequence? = null
    val text2: CharSequence? = ""
    val text3: CharSequence? = "Hello, Kotlin!"

    println(text1.isNullOrEmpty()) // true
    println(text2.isNullOrEmpty()) // true
    println(text3.isNullOrEmpty()) // false
}

Source