does::createLink

static function createLink($id, $parentId, $behaviour = array())
{
	// bless the php7
	// was: ($id, $parentId, $type = self::LINK_TYPE_FINISH_START, array $behaviour = array())

	$type = self::LINK_TYPE_FINISH_START;

	if(func_num_args() > 2) // the third argument may be $type or $behaviour
	{
		$arg3 = func_get_arg(2);
		if(is_array($arg3))
		{
			$behaviour = $arg3;
		}
		else
		{
			$type = $arg3;
			if(func_num_args() > 3)
			{
				$behaviour = func_get_arg(3);
			}
		}
	}
	else
	{
		$behaviour = array();
	}

	if(array_key_exists('LINK_TYPE', $behaviour))
	{
		$type = $behaviour['LINK_TYPE'];
	}

	$id = 			Assert::expectIntegerPositive($id, '$id');
	$parentId = 	Assert::expectIntegerPositive($parentId, '$parentId');
	$type = 		Assert::expectEnumerationMember($type, array(
		self::LINK_TYPE_START_START,
		self::LINK_TYPE_START_FINISH,
		self::LINK_TYPE_FINISH_START,
		self::LINK_TYPE_FINISH_FINISH
	), '$type');

	$exceptionInfo = array(
		'AUX' => array(
			'MESSAGE' => array(
				'FROM_TASK_ID' => $parentId,
				'TASK_ID' => $id,
				'LINK_TYPE' => $type
			)
		)
	);

	$result = new AddResult();

	if(is_array($behaviour['TASK_DATA']) && !empty($behaviour['TASK_DATA']))
	{
		$toTask = $behaviour['TASK_DATA'];
	}
	else
	{
		$toTask = 	TaskTable::getById($id)->fetch();
	}
	if(empty($toTask))
	{
		throw new ActionFailedException('Task not found', $exceptionInfo);
	}

	if(is_array($behaviour['PARENT_TASK_DATA']) && !empty($behaviour['PARENT_TASK_DATA']))
	{
		$fromTask = $behaviour['PARENT_TASK_DATA'];
	}
	else
	{
		$fromTask = 	TaskTable::getById($parentId)->fetch();
	}
	if(empty($fromTask))
	{
		throw new ActionFailedException('Parent task not found', $exceptionInfo);
	}

	if((string) $toTask['CREATED_DATE'] == '')
	{
		$result->addError(new Error(Loc::getMessage('DEPENDENCE_ENTITY_CANT_ADD_LINK_CREATED_DATE_NOT_SET')));
	}
	if((string) $toTask['END_DATE_PLAN'] == '')
	{
		$result->addError(new Error(Loc::getMessage('DEPENDENCE_ENTITY_CANT_ADD_LINK_END_DATE_PLAN_NOT_SET')));
	}

	if((string) $fromTask['CREATED_DATE'] == '')
	{
		$result->addError(new Error(Loc::getMessage('DEPENDENCE_ENTITY_CANT_ADD_LINK_CREATED_DATE_NOT_SET_PARENT_TASK')));
	}
	if((string) $fromTask['END_DATE_PLAN'] == '')
	{
		$result->addError(new Error(Loc::getMessage('DEPENDENCE_ENTITY_CANT_ADD_LINK_END_DATE_PLAN_NOT_SET_PARENT_TASK')));
	}

	if(!$result->isSuccess())
	{
		return $result;
	}
	else
	{
		$linkData = array('TYPE' => $type);
		if(array_key_exists('CREATOR_ID', $behaviour) && intval($behaviour['CREATOR_ID']))
		{
			$linkData['CREATOR_ID'] = $behaviour['CREATOR_ID'];
		}

		return parent::createLink($id, $parentId, array('LINK_DATA' => $linkData));
	}
}