ObjectOutput out = new ObjectOutputStream(baos);
descr.writeExternal(out);
ObjectInput in = new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray()));
PackageDescr newDescr = new PackageDescr();
newDescr.readExternal(in);
assertFalse(newDescr.getImports().contains(badImportDescr));
assertTrue(newDescr.getImports().contains(importDescr));
} catch ( IOException ioe ) {