public void importFromXMI(InputStream inputStream) {
   try {
     XMIReaderFactory factory = XMIReaderFactory.getDefault();
     XMIReader reader = factory.createXMIReader();
     reader.read(inputStream, null, spagobiPackage);
     inputStream.close();
   } catch (Throwable t) {
     throw new RuntimeException("Impossible to import cwm from xmi", t);
   }
 }