pool.php

См. документацию.

<?php
namespace Bitrix\Location\Repository\Location\Cache;
 
use Bitrix\Location\Entity\Location;
use Bitrix\Main\ArgumentTypeException;
use Bitrix\Main\Web\Json;

class Pool extends \Bitrix\Location\Common\Pool
{
    public function getItem(string $index)
    {
        $result = parent::getItem($index);
 
        try
        {
            $result = Json::decode($result);
            $result = Location::fromArray($result);
        }
        catch (\Exception $e)
        {
            $result = null;
        }
 
        return $result;
    }
 
    public function addItem(string $index, $location): void
    {
        if(!($location instanceof Location))
        {
            throw new ArgumentTypeException('location must be type of Location');
        }
 
        parent::addItem(
            $index, Json::encode(
                $location->toArray()
            )
        );
    }
}