How to create rubber like entry animation

[SAGARSURI]

What feature would you like to see?

Hello,
I want to achieve this kind of entry animation for my bottom sheet:
https://raw.githubusercontent.com/mcrovero/rubber/master/assets/video1.gif

I have overridden the buildTransition but still doesn't see the effect:

class RubberBandCurve extends Curve {
  final double elasticity; // Higher = more stretchy

  const RubberBandCurve({this.elasticity = 0.5});

  @override
  double transform(double t) {
    // Base ease out function
    double easeOut = 1.0 - pow(1.0 - t, 2).toDouble();

    // Add oscillation with decreasing amplitude
    if (t > 0.9) return 1.0; // Stabilize at the end

    // Overshoot calculation: adds oscillation with decreasing amplitude
    double oscillation =
        -elasticity * sin((t * pi) * (1 + 1.5 * t)) * pow(1 - t, 2).toDouble();

    return easeOut + oscillation;
  }
}

overridden buildTransition:

@override
  Widget buildTransitions(
    BuildContext context,
    Animation<double> animation,
    Animation<double> secondaryAnimation,
    Widget child,
  ) {
    // Apply custom rubber band curve
    final rubberAnimation = CurvedAnimation(
      parent: animation,
      curve: RubberBandCurve(elasticity: 0.5),
    );

    return SlideTransition(
      position: Tween<Offset>(
        begin: const Offset(0.0, 1.0),
        end: Offset.zero,
      ).animate(rubberAnimation),
      child: child,
    );
  }