computeIfAbsent

actual inline fun <K, V> MutableMap<K, V>.computeIfAbsent(key: K, defaultValue: () -> V): V

expect inline fun <K, V> MutableMap<K, V>.computeIfAbsent(key: K, crossinline defaultValue: () -> V): V

actual inline fun <K, V> MutableMap<K, V>.computeIfAbsent(key: K, crossinline defaultValue: () -> V): V