update

dart_ex_1/ex_2.dart

@@ -12,7 +12,10 @@ abstract class SmartDevice {
   static const String brand = "GeminiHome";
 
   // 1. Standard Constructor with named parameters
-  SmartDevice({required this.id, required String name}) : _name = name;
+  SmartDevice({
+    required this.id, 
+    required String name
+    }) : _name = name;
 
   // 2. Named Constructor: Preset for Office use
   SmartDevice.office({required this.id})