content: import 'package:flutter/material.dart';
  import 'package:flutter_widget_demo/bottomsheet/PersistentBottomSheetWidget.dart';
  import 'package:flutter_widget_demo/bottomsheet/ShowModalBottomSheetWidget.dart';
  import 'package:flutter_widget_demo/bottomsheet/ShowPersistentBottomSheetWidget.dart';
  class BottomSheetPage extends StatelessWidget {
  
    @override
    Widget build(BuildContext context) {
      // TODO: implement build
      return Scaffold(
        appBar: AppBar(
          title: Text('BottomSheet'),
        ),
        body: ListView(
          children: <Widget>[
            GestureDetector(
              child: ListTile(
                title: Text('PersistentBottomSheet: showBottomSheet()'),
              ),
              onTap: () {
                Navigator.push(context,
                    MaterialPageRoute(builder: (context) => ShowPersistentBottomSheetWidget()));
              },
            ),
            GestureDetector(
              child: ListTile(
                title: Text('PersistentBottomSheet: bottomSheet'),
              ),
              onTap: () {
                Navigator.push(context,
                    MaterialPageRoute(builder: (context) => PersistentBottomSheetWidgetWidget()));
              },
            ),
            GestureDetector(
              child: ListTile(
                title: Text('ModalBottomSheet: showModalBottomSheet()'),
              ),
              onTap: () {
                Navigator.push(context,
                    MaterialPageRoute(builder: (context) => ShowModalBottomSheetWidget()));
              },
            )
          ],
        ),
      );
    }
  }
  