[FString](API\Runtime\Core\Containers\FString) AddAggregatePin ( [URigVMNode](API\Plugins\RigVMDeveloper\RigVMModel\URigVMNode) * InNode, const [FString](API\Runtime\Core\Containers\FString) & InPinName, const [FString](API\Runtime\Core\Containers\FString) & InDefaultValue, bool bSetupUndoRedo, bool bPrintPythonCommand )