Available on jvm
staticempty():OptionalInt
staticof(param1:Int):OptionalInt
equals(param1:Dynamic):Bool
getAsInt():Int
hashCode():Int
ifPresent(param1:IntConsumer):Void
isPresent():Bool
orElse(param1:Int):Int
orElseGet(param1:IntSupplier):Int
orElseThrow<X>(param1:Supplier<X>):Int
toString():String