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# register(_:forItemWithIdentifier:completionHandler:)

Registers the URL session task responsible for the specified item.

```
func register(_ task: URLSessionTask, forItemWithIdentifier identifier: NSFileProviderItemIdentifier, completionHandler completion: @escaping @Sendable ((any Error)?) -> Void)
```

## Discussion

> Important:
> You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:
> 
> ```swift
> func register(_ task: URLSessionTask, forItemWithIdentifier identifier: NSFileProviderItemIdentifier) async throws
> ```
> 
> For information about concurrency and asynchronous code in Swift, see <doc://com.apple.documentation/documentation/Swift/calling-objective-c-apis-asynchronously>.

---

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