FDataflowEditorViewportClient ( [FPreviewScene](API\Runtime\Engine\FPreviewScene) * InPreviewScene, const [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [SEditorViewport](API\Editor\UnrealEd\SEditorViewport) > InEditorViewportWidget, [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [FDataflowEditorToolkit](API\Plugins\DataflowEditor\Dataflow\FDataflowEditorToolkit) > InDataflowEditorToolkitPtr )