SearchResultIteratorFactory.php

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<?php
namespace Magento\Framework\Data;

class SearchResultIteratorFactory
{
    protected $objectManager;

    public function __construct(\Magento\Framework\ObjectManagerInterface $objectManager)
    {
        $this->objectManager = $objectManager;
    }

    public function create($className, array $arguments = [])
    {
        $resultIterator = $this->objectManager->create($className, $arguments);
        if (!$resultIterator instanceof \Traversable) {
            throw new \Magento\Framework\Exception\LocalizedException(
                new \Magento\Framework\Phrase('%1 should be an iterator', [$className])
            );
        }
        return $resultIterator;
    }
}