Close popup issue

[Tigran-Kosemyan]

After update the latest version, use same logic with new changes, I get this error when dropdown opened and I go to another page , in previous version used same logic but I don't have this issue

The following assertion was thrown while finalizing the widget tree: You have popped the last page off of the stack, there are no pages left to show 'package:go_router/src/delegate.dart': Failed assertion: line 119 pos 7: 'currentConfiguration.isNotEmpty'

When the exception was thrown, this was the stack: #2 GoRouterDelegate._debugAssertMatchListNotEmpty (package:go_router/src/delegate.dart:119:7) #3 GoRouterDelegate._completeRouteMatch. (package:go_router/src/delegate.dart:165:7) #4 GoRouterDelegate._completeRouteMatch (package:go_router/src/delegate.dart:167:6) #5 GoRouterDelegate._handlePopPageWithRouteMatch (package:go_router/src/delegate.dart:135:7) #6 _CustomNavigatorState._handlePopPage (package:go_router/src/builder.dart:416:42) #7 NavigatorState.pop (package:flutter/src/widgets/navigator.dart:5357:28) #8 Navigator.pop (package:flutter/src/widgets/navigator.dart:2665:27) #9 DropdownSearchPopupState.closePopup (package:dropdown_search/src/widgets/dropdown_search_popup.dart:781:34) #10 DropdownSearchState.dispose (package:dropdown_search/dropdown_search.dart:773:34) #11 StatefulElement.unmount (package:flutter/src/widgets/framework.dart:5826:11) 465 more (elided 2 frames from class _AssertionError)