Response.php

См. документацию.

<?php
 
namespace Bitrix\Lists\Api\Response;
 
class Response extends \Bitrix\Main\Result
{
    public function getPermission(): int | string
    {
        return $this->data['permission'] ?? \CListPermissions::ACCESS_DENIED;
    }

    public function setPermission(int | string $permission): static
    {
        $this->data['permission'] = $permission;
 
        return $this;
    }

    public function fillFromResponse(Response $response): static
    {
        $this
            ->setPermission($response->getPermission())
            ->addErrors($response->getErrors())
        ;
 
        return $this;
    }
}