ExprollablePageController.jumpViewportOffsetTo doesn't work

[khoadng]

import 'package:example/src/common.dart';
import 'package:exprollable_page_view/exprollable_page_view.dart';
import 'package:flutter/material.dart';

class SimpleExample extends StatefulWidget {
  const SimpleExample({super.key});

  @override
  State<SimpleExample> createState() => _SimpleExampleState();
}

class _SimpleExampleState extends State<SimpleExample> {
  late final controller = ExprollablePageController(
    initialPage: 0,
    maxViewportOffset: ViewportOffset.shrunk,
    minViewportFraction: 0.8,
    snapViewportOffsets: [
      ViewportOffset.expanded,
      ViewportOffset.shrunk,
    ],
  );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        actions: [
          IconButton(
              onPressed: () =>
                  controller.jumpViewportOffsetTo(ViewportOffset.expanded),
              icon: Icon(Icons.keyboard_double_arrow_down))
        ],
      ),
      bottomNavigationBar: const ExampleBottomAppBar(),
      body: ExprollablePageView(
        controller: controller,
        itemCount: 5,
        itemBuilder: (context, page) {
          return ExampleListView(
            controller: PageContentScrollController.of(context),
            page: page,
          );
        },
      ),
    );
  }
}

[fujidaiti]

I can't believe I didn't notice such a serious bug... thanks.