sizeFactor property

Animation<double> sizeFactor

The animation that controls the (clipped) size of the child.

The width or height (depending on the axis value) of this widget will be its intrinsic width or height multiplied by sizeFactor's value at the current point in the animation.

If the value of sizeFactor is less than one, the child will be clipped in the appropriate axis.

Implementation 

Animation<double> get sizeFactor => listenable;