usertogroupsettings.php

См. документацию.

<?php
 
namespace Bitrix\Socialnetwork\Filter;
 
class UserToGroupSettings extends \Bitrix\Main\Filter\EntitySettings
{
    public function getEntityTypeName()
    {
        return 'USER_TO_WORKGROUP';
    }

    public function getUserFieldEntityID()
    {
        return \Bitrix\Socialnetwork\UserToGroupTable::getUfId();
    }
}