Changed Slot in RelayNode to ProxySlot;

Changed PullData and PushData from SlotExtension to ISlot;

Added BackTraceExecutableNode;

Removed IExecutable from RelayNode;

Sample/Runtime/Models/Nodes/Add.cs

@@ -5,7 +5,7 @@ using Misaki.GraphView.Editor;
 namespace Misaki.GraphView.Sample
 {
     [NodeInfo("Add", "Math")]
-    public class Add : ExecutableNode
+    public class Add : BackTraceExecutableNode
     {
         [NodeInput]
 #if UNITY_EDITOR

Sample/Runtime/Models/Nodes/BaseClasses.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: b5cf6534e577abb45a6f0a178aba73eb
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Sample/Runtime/Models/Nodes/BaseClasses/BackTraceExecutableNode.cs

@@ -0,0 +1,19 @@
+namespace Misaki.GraphView.Sample
+{
+    public abstract class BackTraceExecutableNode : ExecutableNode
+    {
+        protected override void OnPullData(ISlot input)
+        {
+            if (input.LinkedSlotDatas.Count == 0)
+            {
+                return;
+            }
+
+            var outputNode = GraphObject.GetNode(input.LinkedSlotDatas[0].nodeID);
+            if (outputNode is IExecutable executable)
+            {
+                executable.Execute();
+            }
+        }
+    }
+}

Sample/Runtime/Models/Nodes/BaseClasses/BackTraceExecutableNode.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 45807fa2f84655b4783b18aee34a21c9

Sample/Runtime/Models/Nodes/Output.cs

@@ -1,7 +1,7 @@
 namespace Misaki.GraphView.Sample
 {
     [NodeInfo("Output Node", "Output")]
-    public class Output : ExecutableNode
+    public class Output : BackTraceExecutableNode
     {
         [NodeInput]
         private float _input;