public static function run($dataDir = null)
 {
     # Create instance of Diagram
     $diagram = new Diagram($dataDir . "drawing.vsd");
     # remove all macros
     $diagram->setVbProjectData(null);
     # Save as VDX
     $saveFileFormat = new SaveFileFormat();
     $diagram->save($dataDir . "RemoveAllMacros.vdx", $saveFileFormat->VDX);
     print "Removed all macros from diagram successfully!" . PHP_EOL;
 }