Usage of Magento\Framework\Stdlib\ArrayManager in Magento 2 while working with nested arrays

Vendor\Module\Plugin\Checkout\AddProductLabelPlugin

<?php

declare(strict_types=1);

namespace Vendor\Module\Plugin\Checkout;

use Magento\Checkout\Model\DefaultConfigProvider;
use Magento\Framework\Stdlib\ArrayManager;

class AddProductLabelPlugin
{
    /**
     * @var ArrayManager
     */
    protected $arrayManager;

    /**
     * @param ArrayManager $arrayManager
     */
    public function __construct(
        ArrayManager $arrayManager
    ) {
        $this->arrayManager = $arrayManager;
    }

    /**
     * Adds shipping label for product data
     *
     * @param DefaultConfigProvider $subject
     * @param array $result
     *
     * @return array
     *
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    public function afterGetConfig(DefaultConfigProvider $subject, array $result): array
    {
        if (!$this->arrayManager->exists('totalsData/items', $result)) {
            return $result;
        }

        $items = $this->arrayManager->get('totalsData/items', $result);

        foreach ($items as $index => $itemData) {
            $result = $this->arrayManager->set(
                'totalsData/items/' . $index .'/shipping_method',
                $result,
                __('Some label')
            );
        }

        return $result;
    }
}