Available on jvm
new()
new(param1:Dynamic)
lock:Dynamic
append(param1:CharSequence):Writer
append(param1:Char16):Writer
append(param1:CharSequence, param2:Int, param3:Int):Writer
close():Void
flush():Void
write(param1:Int):Void
write(param1:String, param2:Int, param3:Int):Void
write(param1:String):Void
write(param1:NativeArray<Char16>, param2:Int, param3:Int):Void
write(param1:NativeArray<Char16>):Void