null safety

lib/pages/widgets/local_title.dart

@@ -4,10 +4,10 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 class LocalTitle extends StatelessWidget {
-  final String textKey;
-  final Widget trailing;
+  final String? textKey;
+  final Widget? trailing;
 
-  const LocalTitle({Key key, this.textKey, this.trailing}) : super(key: key);
+  const LocalTitle({Key? key, this.textKey, this.trailing}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -20,13 +20,13 @@ class LocalTitle extends StatelessWidget {
             children: [
               LocalText(
                 context,
-                textKey,
+                textKey!,
                 fontSize: 20,
                 fontWeight: FontWeight.bold,
                 color: primaryColor,
               ),
               trailing != null ? Spacer() : Container(),
-              trailing != null ? trailing : Container()
+              trailing != null ? trailing! : Container()
             ],
           ),
         ),