使用官网的demon BrnSelectedListActionSheet 报错

[an-bad-apple]

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标题格式：[BUG]: 问题简介

The following _TypeError was thrown building:
type '(int, String) => String' is not a subtype of type '(int, String?) => dynamic'

When the exception was thrown, this was the stack:
#0 _BrnActionSheetSelectedItemListState.build. (package:bruno/src/components/actionsheet/brn_selected_list_action_sheet.dart:474:49)
#1 SliverChildBuilderDelegate.build (package:flutter/src/widgets/scroll_delegate.dart:490:22)
#2 SliverMultiBoxAdaptorElement._build (package:flutter/src/widgets/sliver.dart:828:28)
#3 SliverMultiBoxAdaptorElement.performRebuild.processElement (package:flutter/src/widgets/sliver.dart:758:67)
#4 Iterable.forEach (dart:core/iterable.dart:347:35)
#5 SliverMultiBoxAdaptorElement.performRebuild (package:flutter/src/widgets/sliver.dart:805:24)
#6 SliverMultiBoxAdaptorElement.update (package:flutter/src/widgets/sliver.dart:734:7)
#7 Element.updateChild (package:flutter/src/widgets/framework.dart:3685:15)

[luyanlovelele]

itemTitleBuilder: (int index, String? entity) {
return entity;
},