v1.26.10 login exception handling with bloc 8.0

lib/library/dropdown_search/dropdown_search.dart

@@ -296,7 +296,7 @@ class DropdownSearchState<T> extends State<DropdownSearch<T?>> {
       initialValue: widget.selectedItem,
       builder: (FormFieldState<T> state) {
         if (state.value != value) {
-          WidgetsBinding.instance!.addPostFrameCallback((_) {
+          WidgetsBinding.instance.addPostFrameCallback((_) {
             state.didChange(value);
           });
         }

lib/library/dropdown_search/select_dialog.dart

@@ -182,7 +182,7 @@ class _SelectDialogState<T> extends State<SelectDialog<T?>> {
           content: _errorWidget(error),
           actions: <Widget>[
             TextButton(
-              child: new Text("OK"),
+              child: const Text("OK"),
               onPressed: () {
                 Navigator.of(context).pop(false);
               },