List<IDifference> results = membersModified.check(differences);
assertNotNull("The results must not be null", results);
assertTrue(results.isEmpty());
//now we modify a bit and run the check again.
IParameter parameter = new Parameter();
parameter.setName("newSize");
((IOperation)dmMember).addParameter(parameter);
results = membersModified.check(differences);
int size = results.size();
assertTrue("Now there must be a difference <" + size + ">", size == 1);
}