[UMovieSceneTrack](API\Runtime\MovieScene\UMovieSceneTrack) * AddTrack ( [UMovieScene](API\Runtime\MovieScene\UMovieScene) * FocusedMovieScene, const [FGuid](API\Runtime\Core\Misc\FGuid) & ObjectHandle, [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< class [UMovieSceneTrack](API\Runtime\MovieScene\UMovieSceneTrack) > TrackClass, [FName](API\Runtime\Core\UObject\FName) UniqueTypeName )