@override
  Widget build(BuildContext context) {
    final items = ['Item 1', 'Item 2', 'Item 3'];

    return Scaffold(
      body: Center(
        child: SingleChildScrollView(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.center,
            mainAxisSize: MainAxisSize.min,
            children: [
              DropdownButton<String>(
                items: items
                    .map(
                      (e) => DropdownMenuItem(
                        value: e,
                        child: Text(e),
                      ),
                    )
                    .toList(),

                onChanged: (v) {},
              ),
              SizedBox(height: 16),
              DropdownMenu<String>(
                showTrailingIcon: false,
                dropdownMenuEntries: items
                    .map(
                      (e) => DropdownMenuEntry(
                        value: e,
                        label: e,
                      ),
                    )
                    .toList(),
              ),
            ],
          ),
        ),
      ),
    );
  }