scaling constant

FloatingActionButtonAnimator const scaling = const _ScalingFabMotionAnimator()

Moves the FloatingActionButton by scaling out and then in at a new FloatingActionButtonLocation.

This animator shrinks the FloatingActionButton down until it disappears, then grows it back to full size at its new FloatingActionButtonLocation.

This is the default FloatingActionButton motion animation.

Implementation 

static const FloatingActionButtonAnimator scaling = _ScalingFabMotionAnimator()