// Managed file.
$uri = $this->createUri();
$url = file_create_url($uri);
$public_directory_path = \Drupal::service('stream_wrapper_manager')->getViaScheme('public')->getDirectoryPath();
// Managed file.
$uri = $this->createUri();
$url = file_create_url($uri);
$public_directory_path = \Drupal::service('stream_wrapper_manager')->getViaScheme('public')->getDirectoryPath();