DataCounter::leave

public function leave($leaveTypeId = null)
{
	if (!$leaveTypeId)
	{
		return $this;
	}

	foreach ($this->data as $typeId => $count)
	{
		if ($leaveTypeId == $typeId)
		{
			continue;
		}

		unset($this->data[$typeId]);
	}

	return $this;
}