how to catch timeout exception in swift outputstream
In Swift, when dealing with `OutputStream`, you typically handle errors or exceptions using the delegate methods provided by the `StreamDelegate` protocol or by checking the stream status. However, `OutputStream` does not directly throw exceptions like some other languages or frameworks. Instead, you need to monitor the stream's status and handle any errors appropriately.

Here's a basic example of how to catch and handle errors, including timeouts, when using `OutputStream` in Swift:

1. **Set Up the OutputStream**: Create and open an `OutputStream`.
2. **Implement StreamDelegate**: Implement the `StreamDelegate` protocol to handle events.
3. **Monitor the Stream's Status**: Check for errors in the `stream(_:handle:)` method.

Here’s a simple implementation:

```swift
import Foundation

class StreamHandler: NSObject, StreamDelegate {
    var outputStream: OutputStream?

    func setupOutputStream(to host: String, port: Int) {
        var outputStreamPtr: Unmanaged<OutputStream>?
        Stream.getStreamsToHost(withName: host, port: port, inputStream: nil, outputStream: &outputStreamPtr)

        if let outputStream = outputStreamPtr?.takeRetainedValue() {
            self.outputStream = outputStream
            self.outputStream?.delegate = self
            self.outputStream?.schedule(in: .current, forMode: .default)
            self.outputStream?.open()
        }
    }


  In Swift, you can catch a `TimeoutException` thrown by an `OutputStream` using a `catch` block. Here's an example:
```
let outputStream = OutputStream(to: destination)

// Write data to the output stream
outputStream.write("Hello, world!")

// Catch a TimeoutException if it's thrown
outputStream.catch {
    if $0 is TimeoutException {
        // Handle the TimeoutException
        print("Timeout exception caught!")
    }
}
```
In this example, the `catch` block is used to catch any `TimeoutException` that may be thrown by the `OutputStream`. If the `TimeoutException` is caught, it will be stored in the `$0` variable, and you can then handle it as needed.

Alternatively, you can also use a `do-catch` block to catch the `TimeoutException`:
```
let outputStream = OutputStream(to: destination)

// Write data to the output stream
outputStream.write("Hello, world!")

do {
    _ = outputStream
} catch TimeoutException {
    print("Timeout exception caught!")
}
```
In this example, the `do-catch` block is used to execute the code inside the block, and then catch any `TimeoutException` that may be thrown. If