Concurrency support Types you use to access model attributes and perform storage-related tasks in a safe and isolated way. TopicsModel actorsModelActor()ModelActorModel executorsDefaultSerialModelExecutorSerialModelExecutorModelExecutor See AlsoModel life cycleModelContainerModelContextFetching and filtering time-based model changesHistoryDescriptorDeleting persistent data from your appReverting data changes using the undo managerSyncing model data across a person’s devices