IteratorFactory.php

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<?php
namespace Magento\Analytics\ReportXml;

use Magento\Framework\ObjectManagerInterface;

class IteratorFactory
{
    private $objectManager;

    private $defaultIteratorName;

    public function __construct(
        ObjectManagerInterface $objectManager,
        $defaultIteratorName = \IteratorIterator::class
    ) {
        $this->objectManager = $objectManager;
        $this->defaultIteratorName = $defaultIteratorName;
    }

    public function create(\Traversable $result, $iteratorName = null)
    {
        return $this->objectManager->create(
            $iteratorName ?: $this->defaultIteratorName,
            [
                'iterator' => $result
            ]
        );
    }
}