fromTop static method
Slide animation, from top to bottom (SlideTransition)
Implementation
static fromTop(Animation<double> animation,
Animation<double> secondaryAnimation, Widget child) {
return SlideTransition(
position: Tween<Offset>(
begin: const Offset(0.0, -1.0),
end: Offset.zero,
).animate(animation),
child: child,
);
}