fastOutSlowIn constant

Cubic const fastOutSlowIn = const Cubic(0.4, 0.0, 0.2, 1.0)

A curve that starts quickly and eases into its final position.

Over the course of the animation, the object spends more time near its final destination. As a result, the user isn’t left waiting for the animation to finish, and the negative effects of motion are minimized.

Implementation 

static const Cubic fastOutSlowIn = Cubic(0.4, 0.0, 0.2, 1.0)