Member::getValue

public function getValue($key, $item, array $parameters = array())
{
	/** @var BitrixTasksItemTaskCollectionMember $memberCollection */
	$memberCollection = $item['SE_MEMBER'];

	$result = array();
	$members = $memberCollection->find(array('=TYPE' => $this->type));
	foreach($members as $member)
	{
		$result[] = $member['USER_ID'];
	}

	return $this->createValue($result, $key, $item);
}