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DrupalURLRector

Fixes deprecated \Drupal::url() calls

-\Drupal::url('user.login');
+\Drupal\Core\Url::fromRoute('user.login')->toString();

Configure your rector.php:

<?php

use DrupalRector\Drupal8\Rector\Deprecation\DrupalURLRector;
use Rector\Config\RectorConfig;

return RectorConfig::configure()
    ->withRules([
        DrupalURLRector::class,
    ]);