```swift
// Tests only against the local state
if post.title.starts(with: "[Amplify]") {
    let savedPost = try await Amplify.DataStore.save(post)
}

// Only applies the update if the data in the remote backend satisfies the criteria
let savedPost = try await Amplify.DataStore.save(
    post,
    where: Post.keys.title.beginsWith("[Amplify]")
)
```