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Before After
file_create_url($uri) \Drupal::service('file_url_generator')->generateAbsoluteString($uri)
file_url_transform_relative($file_url) \Drupal::service('file_url_generator')->transformRelative($file_url)
file_url_transform_relative(file_create_url($uri) \Drupal::service('file_url_generator')->generateString($uri)
Drupal\Core\Url::fromUri(file_create_url($uri)) \Drupal::service('file_url_generator')->generate($uri)