easeInSine constant Null safety
A cubic animation curve that starts slowly and ends quickly. This is similar to Curves.easeIn, but with sinusoidal easing for a slightly less abrupt beginning and end. Nonetheless, the result is quite gentle and is hard to distinguish from Curves.linear at a glance.
Derived from Robert Penner’s easing functions.
static const Cubic easeInSine = Cubic(0.47, 0.0, 0.745, 0.715);