@:optionalacceleration:Null<FlxPoint>
@:optionalanimation:Null<String>
position:FlxPoint
@:optionalutil_amount:Null<Float>
@:optionalutil_bool:Null<Bool>
@:optionalutil_color:Null<Int>
@:optionalutil_int:Null<Int>
@:optionalvelocity:Null<FlxPoint>