BottomSheetPresentationController_4.swift

override func containerViewDidLayoutSubviews() {
    super.containerViewDidLayoutSubviews()
    
    guard let presentedView, let containerView else {
        return
    }
    
    dimmedBackgroundView.frame = containerView.bounds
    
    grabberView.frame.origin.y = 8
    grabberView.center.x = presentedView.center.x
    grabberView.layer.cornerRadius = grabberView.frame.height / 2
    
    setupInteraction()
    
    presentedView.layer.maskedCorners = [.layerMinXMinYCorner, .layerMaxXMinYCorner]
            
    presentedViewController.additionalSafeAreaInsets.top = grabberView.frame.maxY
}