Cleaned up the code

com.unity.shadergraph/Editor/Drawing/Views/MaterialNodeView.cs

         VisualElement m_ControlsDivider;
         IEdgeConnectorListener m_ConnectorListener;
         VisualElement m_PortInputContainer;
-        VisualElement m_Title;
-        IconBadge m_WrongPipeline;
+
 
         public void Initialize(AbstractMaterialNode inNode, PreviewManager previewManager, IEdgeConnectorListener connectorListener)
         {
             {
                 if (!masterNode.IsPipelineCompatible(RenderPipelineManager.currentPipeline))
                 {
-                    m_WrongPipeline = IconBadge.CreateError("The current render pipeline is not compatible with this node preview.");
-                    Add(m_WrongPipeline);
-                    m_Title = this.Q("title");
-                    m_WrongPipeline.AttachTo(m_Title, SpriteAlignment.LeftCenter);
+                    IconBadge wrongPipeline = IconBadge.CreateError("The current render pipeline is not compatible with this node preview.");
+                    Add(wrongPipeline);
+                    VisualElement title = this.Q("title");
+                    wrongPipeline.AttachTo(title, SpriteAlignment.LeftCenter);
                 }
             }