is::getStagePercent

public function getStagePercent($sNum = false)
{
	if ($sNum === false)
	{
		$stage = $this->stages[$this->stage]['PERCENT'] ?? 0;
	}
	else
	{
		if (is_numeric($sNum))
		{
			$stage = $this->stages[$sNum]['PERCENT'] ?? 0;
		}
		else
		{
			$stage = $this->stagesByCode[$sNum]['PERCENT'] ?? 0;
		}
	}

	return $stage ?: 0;
}