# HistoryInsert ``` protocol HistoryInsert : Sendable ``` ## Topics ### Associated Types [`associatedtype ChangeIdentifier : Comparable, Hashable, Sendable`](/documentation/SwiftData/HistoryInsert/ChangeIdentifier-swift.associatedtype) [`associatedtype Model : PersistentModel`](/documentation/SwiftData/HistoryInsert/Model) [`associatedtype TransactionIdentifier : Comparable, Hashable, Sendable`](/documentation/SwiftData/HistoryInsert/TransactionIdentifier-swift.associatedtype) ### Instance Properties [`var changeIdentifier: Self.ChangeIdentifier`](/documentation/SwiftData/HistoryInsert/changeIdentifier-swift.property) [`var changedPersistentIdentifier: PersistentIdentifier`](/documentation/SwiftData/HistoryInsert/changedPersistentIdentifier) [`var transactionIdentifier: Self.TransactionIdentifier`](/documentation/SwiftData/HistoryInsert/transactionIdentifier-swift.property) ## Relationships ### Conforming Types [`DefaultHistoryInsert`](/documentation/SwiftData/DefaultHistoryInsert) ### Inherits From [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)