static void DuplicateNodes ( [UDataflow](API\Runtime\DataflowEngine\Dataflow\UDataflow) * Graph, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SDataflowGraphEditor](API\Plugins\DataflowEditor\Dataflow\SDataflowGraphEditor) > & DataflowGraphEditor, const FGraphPanelSelectionSet & SelectedNodes )