first

lib/src/Data/AutoList.dart

@@ -73,6 +73,12 @@ class AutoList<T, ST> extends IDestructible with IterableMixin<T> {
     emitArgs("add", [_state, value]);
   }
 
+ 
+  T? first(bool Function(T element) selector) {
+    final res = _list.where(selector);
+    return res.isEmpty ? null : res.first;
+  }
+
   /// <summary>
   /// Add an array of items to the list
   /// </summary>

lib/src/Data/KeyList.dart

@@ -78,6 +78,11 @@ class KeyList<KT, T> extends IEventHandler with MapMixin<KT, T> {
     }
   }
 
+  T? first(bool Function(T element) selector) {
+    final res = _map.where(selector);
+    return res.isEmpty ? null : res.first;
+  }
+
   _itemDestroyed(T sender) {
     removeValue(sender);
   }