link.module

<?php


/**
 * @file
 */
use Drupal\Core\Link;

/**
 * Prepares variables for separated link field templates.
 *
 * This template outputs a separate title and link.
 *
 * Default template: link-formatter-link-separate.html.twig.
 *
 * @param array $variables
 *   An associative array containing:
 *   - title: (optional) A descriptive or alternate title for the link, which
 *     may be different than the actual link text.
 *   - url_title: The anchor text for the link.
 *   - url: A \Drupal\Core\Url object.
 */
function template_preprocess_link_formatter_link_separate(&$variables) {
    $variables['link'] = Link::fromTextAndUrl($variables['url_title'], $variables['url'])->toString();
}