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My project/Library/PackageCache/com.unity.visualscripting/Documentation~/vs-relations.md

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+# Use relations to debug
+
+Relations are a useful tool to understand the dependencies between each port of a node. For example, to get the result of A + B with the Add node, you need to provide a value for A and B. Likewise, before invoking the Log node, you should provide a value for its Message input port.
+
+![](images/vs-relations-debugging-show-relations.png)
+
+
+
+Visual scripting uses this information in the background for Predictive Debugging. For example, if you tried to get the value of A + B without providing a value for A, the node would show up as orange to indicate that it fails in play mode.
+
+![](images/vs-relations-debugging-predictive.png)
+
+
+When that happens, you can use the warnings shown in the Graph Inspector to know what is missing.
+
+
+Relations can also help understand the ports that are required and which ports are optional. For example, in the Get Child node (under fuzzy finder **Codebase** > **Unity Engine** > **Transform**), there is no need to connect the control ports if the goal is to get the transform value output.
+
+Enable the Relations toggle in the toolbar for the inner connections of each node to be displayed.
+
+> [!NOTE]
+> You cannot edit relations. They are predefined for each type of node.