Bounce in animated navigation effect using flutter and dart

Bounce-In-Navigation.dart

import 'package:flutter/material.dart';
class BounceInNavigation extends PageRouteBuilder {
  final Widget widget;

  BounceInNavigation({this.widget})
      : super(
            transitionDuration: Duration(milliseconds: 270),
            transitionsBuilder: (BuildContext con, Animation<double> animation,
                Animation<double> secAnimation, Widget child) {
              animation = CurvedAnimation(
                  parent: animation, curve: Curves.easeInOutBack);
              return ScaleTransition(
                scale: animation,
                alignment: Alignment.topCenter,
                child: child,
              );
              
            },
            pageBuilder: (BuildContext context, Animation<double> animation,
                Animation<double> secanimation) {
              return widget;
            });
}