I have some issues with this package

[miss00079]

Hello, please help ...

/C:/flutter/.pub-cache/hosted/pub.dartlang.org/multiselect_dropdown_flutter-0.0.7/lib/multiselect_dropdown_flutter.dart:386:18: Error: The method 'MenuAnchor' isn't defined for the class '_MultiSelectDropdownState'.

• '_MultiSelectDropdownState' is from 'package:multiselect_dropdown_flutter/multiselect_dropdown_flutter.dart' ('/C:/flutter/.pub-cache/hosted/pub.dartlang.org/multiselect_dropdown_flutter-0.0.7/lib/multiselect_dropdown_flutter.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'MenuAnchor'.
  child: MenuAnchor(
  ^^^^^^^^^^
  /C:/flutter/.pub-cache/hosted/pub.dartlang.org/multiselect_dropdown_flutter-0.0.7/lib/multiselect_dropdown_flutter.dart:388:20: Error: The method 'MenuStyle' isn't defined for the class '_MultiSelectDropdownState'.
• '_MultiSelectDropdownState' is from 'package:multiselect_dropdown_flutter/multiselect_dropdown_flutter.dart' ('/C:/flutter/.pub-cache/hosted/pub.dartlang.org/multiselect_dropdown_flutter-0.0.7/lib/multiselect_dropdown_flutter.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'MenuStyle'.
  style: MenuStyle(
  ^^^^^^^^^

Thanks