public static function run($dataDir = null)
{
# Instantiate barcode object
$symbology = new Symbology();
$bb = new BarCodeBuilder("12345678", $symbology->Code128);
# Measurement is Milimeter
$graphicsUnit = new GraphicsUnit();
$bb->setGraphicsUnit($graphicsUnit->Point);
# Set the bar height to 3 points
$bb->setBarHeight(3.0);
$bb->save($dataDir . "SetBarcodeImageUnitSize.jpg");
# Display Status.
print "Set Barcode Image Unit Size, please check the output file." . PHP_EOL;
}
