kotlin-stdlib / kotlin.sequences / firstOrNull firstOrNull Common JVM JS Native 1.0 fun <T> Sequence<T>.firstOrNull(): T?(source) Returns the first element, or null if the sequence is empty. The operation is terminal. Common JVM JS Native 1.0 inline fun <T> Sequence<T>.firstOrNull( predicate: (T) -> Boolean): T?(source) Returns the first element matching the given predicate, or null if element was not found. The operation is terminal.