refine code

com.unity.uiwidgets/Runtime/foundation/debug.cs

 using Unity.UIWidgets.engine2;
 using Unity.UIWidgets.painting;
 using Unity.UIWidgets.ui;
+using UnityEngine;
+using Canvas = Unity.UIWidgets.ui.Canvas;
+using Color = Unity.UIWidgets.ui.Color;
+using Debug = UnityEngine.Debug;
+using Rect = Unity.UIWidgets.ui.Rect;
-using UnityEngine;
-using Canvas = Unity.UIWidgets.ui.Canvas;
-using Color = Unity.UIWidgets.ui.Color;
-using Debug = UnityEngine.Debug;
-using Rect = Unity.UIWidgets.ui.Rect;
 
 namespace Unity.UIWidgets.foundation {
     
         }
 #else
         private const bool internalEnableDebugAtRuntime = false;
-
         public static bool enableDebug => internalEnableDebugAtRuntime;
 #endif