activity.php

См. документацию.

<?php
namespace Bitrix\Sale\Exchange\Integration\Service\Internal\Entity;
 
 
use Bitrix\Sale\Exchange\Integration\CRM\EntityType;
 
class Activity extends Base
{
    function getType()
    {
        return EntityType::ACTIVITY;
    }
 
    public function getSubject()
    {
        return $this->fields->get('SUBJECT');
    }
 
    public function setSubject($value)
    {
        $this->fields->set('SUBJECT', $value);
        return $this;
    }
}