lastOrNull
Returns the last element, or null if the sequence is empty.
fun <T> Sequence<T>.lastOrNull(): T?(source)
fun main() {
val numbers = sequenceOf(1, 2, 3, 4, 5)
val lastNumber = numbers.lastOrNull()
println(lastNumber) // prints 5
val empty = emptySequence<Int>()
val lastEmpty = empty.lastOrNull()
println(lastEmpty) // prints null
}