QuoteConversionPhase::isDefined

static function isDefined($phaseID)
{
	if(!is_numeric($phaseID))
	{
		return false;
	}

	if(!is_int($phaseID))
	{
		$phaseID = (int)$phaseID;
	}

	return $phaseID === self::DEAL_CREATION
		|| $phaseID === self::INVOICE_CREATION
		|| $phaseID === self::FINALIZATION;
}