virtual [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< const [mu::FExtensionDataLoadHandle](API\Plugins\MutableRuntime\MuR\FExtensionDataLoadHandle) > StartLoad ( const [mu::ExtensionDataPtrConst](API\Plugins\MutableRuntime\MuR\ExtensionDataPtrConst) & Data, [TArray](API\Runtime\Core\Containers\TArray)< [mu::ExtensionDataPtrConst](API\Plugins\MutableRuntime\MuR\ExtensionDataPtrConst) > & OutUnloadedConstants )