1 class XArray<T> 2 averagenull3fun XArray<out Byte>.average(): Double = 0.0 4 fun XArray<out Double>.average(): Double = 0.0 5 fun XArray<out Float>.average(): Double = 0.0 6 fun XArray<out Int>.average(): Double = 0.0 7 fun XArray<out Long>.average(): Double = 0.0 8 fun XArray<out Short>.average(): Double = 0.0 9