collection.php

См. документацию.

<?php
 
namespace Bitrix\Location\Entity\Location;
 
use Bitrix\Location\Entity\Location;
use Bitrix\Main\ArgumentTypeException;
use Bitrix\Main\Result;

class Collection extends \Bitrix\Location\Entity\Generic\Collection
{
    protected $items = [];
 
    public function addItem($location): int
    {
        if(!($location instanceof Location))
        {
            throw new ArgumentTypeException('location must be the instance of Location');
        }
 
        return parent::addItem($location);
    }

    public function save(): Result
    {
        $result = new Result();
 
        foreach($this->items as $location)
        {
            $res = $location->save();
 
            if(!$res->isSuccess())
            {
                $result->addErrors($res->getErrors());
            }
        }
 
        return $result;
    }
}