Defines the factor by which coordinates are scaled about the center of the object along the Y axis of this Node. This is used to stretch or shrink the node either manually or by using an animation.

This scale factor is not included in layoutBounds by default, which makes it ideal for scaling the entire node after all effects and transforms have been taken into account.

The pivot point about which the scale occurs is the center of the untransformed layoutBounds.

Returns:  the scaleY for this Node

@defaultValue 1.0