static [ULevelVariantSets](API\Plugins\VariantManagerContent\ULevelVariantSets) * ImportLevelVariantSets ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IDatasmithLevelVariantSetsElement](API\Runtime\DatasmithCore\IDatasmithLevelVariantSetsElemen-) > & LevelVariantSets, [FDatasmithImportContext](API\Plugins\DatasmithImporter\FDatasmithImportContext) & InImportContext, [ULevelVariantSets](API\Plugins\VariantManagerContent\ULevelVariantSets) * ExistingLevelVariantSets )