ChatViewModel.swift

func translateAllMessages(using session: TranslationSession) async {
    Task {
        let requests: [TranslationSession.Request] = messages.enumerated().map { (index, message) in
            // Assign each request a client identifier.
                .init(sourceText: message.text, clientIdentifier: "\(index)")
        }


        do {
            for try await response in session.translate(batch: requests) {
                // Use the returned client identifier (the index) to map the request to the response.
                guard let index = Int(response.clientIdentifier ?? "") else { continue }
                messages[index].translation = response.targetText
            }
        } catch {
            // Handle any errors.
        }
    }
}