previous method
void
previous()
Implementation
void previous() {
state!._startSlideAnimation(
state!._slideAnimation(state!._animationController, 0,
end: state!.widget.size.height),
);
}
void previous() {
state!._startSlideAnimation(
state!._slideAnimation(state!._animationController, 0,
end: state!.widget.size.height),
);
}