fix shortcuts

com.unity.uiwidgets/Runtime/scheduler2/binding.cs

                         context: "during a task callback",
                         informationCollector: callbackStack == null
                             ? (InformationCollector) null
-                            : sb => {
+                            : (StringBuilder sb) => {
                                 sb.AppendLine("\nThis exception was thrown in the context of a scheduler callback. " +
                                               "When the scheduler callback was _registered_ (as opposed to when the " +
                                               "exception was thrown), this was the stack: " + callbackStack);
                     context: "during a scheduler callback",
                     informationCollector: callbackStack == null
                         ? (InformationCollector) null
-                        : information => {
+                        : (StringBuilder information) => {
                             information.AppendLine(
                                 "\nThis exception was thrown in the context of a scheduler callback. " +
                                 "When the scheduler callback was _registered_ (as opposed to when the " +

com.unity.uiwidgets/Runtime/widgets/actions.cs

             bool enabled = true,
             FocusNode focusNode = null,
             bool autofocus = false,
-            //Dictionary<LogicalKeySet, Intent> shortcuts = null,
+            Dictionary<LogicalKeySet, Intent> shortcuts = null,
             Dictionary<LocalKey, ActionFactory> actions = null,
             ValueChanged<bool> onShowFocusHighlight = null,
             ValueChanged<bool> onShowHoverHighlight = null,
             this.enabled = enabled;
             this.focusNode = focusNode;
             this.autofocus = autofocus;
-            //this.shortcuts = shortcuts;
+            this.shortcuts = shortcuts;
             this.actions = actions;
             this.onShowFocusHighlight = onShowFocusHighlight;
             this.onShowHoverHighlight = onShowHoverHighlight;
         public readonly Dictionary<LocalKey, ActionFactory> actions;
 
 
-        //public readonly Dictionary<LogicalKeySet, Intent> shortcuts;
+        public readonly Dictionary<LogicalKeySet, Intent> shortcuts;
 
 
         public readonly ValueChanged<bool> onShowFocusHighlight;
                
                 child = new Actions(actions: widget.actions, child: child);
             }
-            /*if (widget.enabled && widget.shortcuts != null && widget.shortcuts.isNotEmpty()) {
+            if (widget.enabled && widget.shortcuts != null && widget.shortcuts.isNotEmpty()) {
-            }*/
+            }
             return child;
         }
     }

com.unity.uiwidgets/Runtime/widgets/shortcuts.cs

           }
           return string.Join(" + ", result.ToArray());
       }
-
+      
       
       public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
         base.debugFillProperties(properties);
         }
     }
     
-    public class ShortcutManager : ChangeNotifier {
+    public class ShortcutManager : DiagnosticableMixinChangeNotifier {
 
       public ShortcutManager(
         Dictionary<LogicalKeySet, Intent> shortcuts = null,
         return false;
       }
 
-      public  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+      public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+          base.debugFillProperties(properties: properties);
-        properties.add(new FlagProperty("modal", value: modal, ifTrue: "modal", defaultValue: false));
+          properties.add(new FlagProperty("modal", value: modal, ifTrue: "modal", defaultValue: false));
       }
     }