I want to change the animation speed applied to itemBuilder on AnimatedList in Flutter.

Widget_buildItem(Host host, Animation<double>animation){
  US>return SizeTransition(
    sizeFactor:animation,
    child —ListTile(
      title:Text(host.name),
      training —PopupMenuButton(
        itemBuilder: (context) {
          return [
            PopupMenuItem(child:Text("Edit"), value:host),
            PopupMenuItem(
                child —Text("Delete"),
                onTap:() {
                  AnimatedListRemovedItemBuilder=
                      (context, animation) {
                    return_buildItem(host, animation);
                  };
                  hosts.removeAt(host.own_index);

                  _listKey.currentState!.removeItem(host.own_index, builder,
                      duration —Duration (milliseconds:200);
                }),
          ];
        },
        icon —Icon(Icons.more_vert),
      ),
    ),
  );
}