# init(_:makeSnapshot:) Creates a reader that converts a `FileWrapper` into a snapshot. ``` init(_ configuration: sending FileWrapperDocumentReader.ReadConfiguration, makeSnapshot: @escaping (FileWrapper) async throws -> sending Snapshot) ``` ## Parameters `configuration` The read configuration passed to [`reader(configuration:)`](/documentation/SwiftUI/ReadableDocument/reader(configuration:)). `makeSnapshot` A closure that deserializes the `FileWrapper` into a snapshot. For flat files, read `regularFileContents`. For packages, navigate `fileWrappers` to find children. Throw an error if the data is malformed. --- 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)