fix: 🐛 correct usage of provide after unmount

CHANGELOG.md

@@ -44,6 +44,8 @@
   to hide user name in chat.
 * **Fix**: [182](https://github.com/SimformSolutionsPvtLtd/flutter_chatview/issues/182) Fix
   send message not working when user start texting after newLine.
+* **Fix**: [191](https://github.com/SimformSolutionsPvtLtd/flutter_chatview/pull/191) Fix
+  error when using `BuildContext` or `State` extensions when not mounted.
 
 ## [1.3.1]
 

CONTRIBUTING.md

@@ -6,3 +6,4 @@
 4.  Make sure your code lints.
 5.  Push your work back up to your fork.
 6.  Create the pull request!
+7.  Include the PR in the CHANGELOG.md

lib/src/extensions/extensions.dart

@@ -129,16 +129,18 @@ extension ChatViewStateTitleExtension on String? {
 
 /// Extension on State for accessing inherited widget.
 extension StatefulWidgetExtension on State {
-  ChatViewInheritedWidget? get provide => ChatViewInheritedWidget.of(context);
+  ChatViewInheritedWidget? get provide =>
+      mounted ? ChatViewInheritedWidget.of(context) : null;
 
   ReplySuggestionsConfig? get suggestionsConfig =>
-      SuggestionsConfigIW.of(context)?.suggestionsConfig;
+      mounted ? SuggestionsConfigIW.of(context)?.suggestionsConfig : null;
 }
 
 /// Extension on State for accessing inherited widget.
 extension BuildContextExtension on BuildContext {
-  ChatViewInheritedWidget? get provide => ChatViewInheritedWidget.of(this);
+  ChatViewInheritedWidget? get provide =>
+      mounted ? ChatViewInheritedWidget.of(this) : null;
 
   ReplySuggestionsConfig? get suggestionsConfig =>
-      SuggestionsConfigIW.of(this)?.suggestionsConfig;
+      mounted ? SuggestionsConfigIW.of(this)?.suggestionsConfig : null;
 }