/**
 * Implements hook_tour_tips_info_alter().
 */
function {{ machine_name }}_tour_tips_info_alter(&$info) {
  // Swap out the class used for this tip plugin.
  if (isset($info['text'])) {
    $info['class'] = 'Drupal\mymodule\Plugin\tour\tip\MyCustomTipPlugin';
  }
}