Drupal 9 commerce - get order number

Drupal 9 commerce - get order number:
By the below method you can generate order number:

public function generateOrderNumber(OrderInterface $order) {

    if ($order->getOrderNumber()) {

      return $order->getOrderNumber();

    }

    $order_type_storage = \Drupal::entityTypeManager()->getStorage('commerce_order_type');

    /** @var \Drupal\commerce_order\Entity\OrderTypeInterface $order_type */

    $order_type = $order_type_storage->load($order->bundle());

    /** @var \Drupal\commerce_number_pattern\Entity\NumberPatternInterface */

    $number_pattern = $order_type->getNumberPattern();

    $order_number = $number_pattern->getPlugin()->generate($order);

    $order->setOrderNumber($order_number);

    return $order->getOrderNumber();

  }

.:Happy coding:.