I need an example code of how to implement the showExpansionTextWhenTruncated on Swift.

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//  ViewController.swift
//  Two Buttons
//  Created by Ricardo E. Marrero Guzmán on 11/25/21.

import UIKit

class ViewController: UIViewController {
    @IBOutlet var label: UILabel!
    @IBOutlet var textField: UITextField!
    override func viewDidLoad() {
        // Do any additional setup after loading the view.
    @IBAction func setTextButtonTapped(_ sender: UIButton) {
        label.showsExpansionTextWhenTruncated = true  // This line doesn't work
        label.text = textField.text
    @IBAction func clearTextButtonTapped(_ sender: UIButton) {
        textField.text = .init()

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