MemberOne::setValue

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

	$memberCollection->updateValuePart(array($value), $this->type, $item);
	$item->setFieldModified('SE_MEMBER'); // todo: get rid of this call when when implement backward connection between item and its field value
}