MapperIterator.php

<?php
 
declare(strict_types=1);
namespace Commercetools\Base;
 
class MapperIterator extends \IteratorIterator
{
    private $mapper;
 
    public function __construct(\Traversable $iterator, callable $mapper)
    {
        parent::__construct($iterator);
        $this->mapper = $mapper;
    }
 
    #[\ReturnTypeWillChange]
    public function current()
    {
        return call_user_func($this->mapper, parent::current(), parent::key());
    }
}