bool AddLink ( [URigVMPin](API\Plugins\RigVMDeveloper\RigVMModel\URigVMPin) * OutputPin, [URigVMPin](API\Plugins\RigVMDeveloper\RigVMModel\URigVMPin) * InputPin, bool bSetupUndoRedo, [ERigVMPinDirection](API\Plugins\RigVM\RigVMCore\ERigVMPinDirection) InUserDirection, bool bCreateCastNode, bool bIsRestoringLinks, [FString](API\Runtime\Core\Containers\FString) * OutFailureReason )