genericconverter.php

См. документацию.

<?php
 
namespace Bitrix\Location\Source\Osm\Converters;

final class GenericConverter extends BaseConverter
{
    private const LEVEL_1_ADMIN_LEVEL = 4;

    protected function getAdminLevel1(): ?array
    {
        foreach ($this->addressComponents as $addressComponent)
        {
            if ($this->isAdministrativeBoundary($addressComponent)
                && $addressComponent['admin_level'] === static::LEVEL_1_ADMIN_LEVEL
            )
            {
                return $addressComponent;
            }
        }
 
        return null;
    }
}