Popsu-coloque/web/core/modules/views/tests/themes/views_test_checkboxes_theme/views_test_checkboxes_theme.theme

<?php

/**
 * @file
 * Changes an exposed "type" filter from a multi-select to checkboxes.
 */

use Drupal\Core\Form\FormStateInterface;

/**
 * Changes an exposed "type" filter from a multi-select to checkboxes.
 */
function views_test_checkboxes_theme_form_views_exposed_form_alter(&$form, FormStateInterface $form_state) {
  if (isset($form['type'])) {
    $form['type']['#type'] = 'checkboxes';
  }
  if (isset($form['tid'])) {
    $form['tid']['#type'] = 'checkboxes';
  }
}