Builder::incGroupCounters

protected function incGroupCounters($groupId = null, $count = 0)
{
	if (!$groupId)
	{
		return;
	}

	if (array_key_exists($groupId, $this->groupCount))
	{
		$this->groupCount[$groupId] += $count;
	}
	else
	{
		$this->groupCount[$groupId] = $count;
	}

}