titanscssc::coerceUnit PHP Method

    protected function coerceUnit($number, $unit)
    {
        list(, $value, $baseUnit) = $number;
        if (isset(self::$unitTable[$baseUnit][$unit])) {
            $value = $value * self::$unitTable[$baseUnit][$unit];
        }
        return array("number", $value, $unit);
    }