for(MetaDataRetrieval rdr : retrievals)
assertFalse(rdr.toString(), rdr.isEmpty());
mmdl.removeMetaData(TestAnnotation.class);
assertTrue(mmdl.toString(), mmdl.isEmpty());
tlmdl.removeAnnotation(TestAnnotation.class);
assertTrue(tlmdl.toString(), tlmdl.isEmpty());
MetaDataRetrieval emptyRetrieval = new MemoryMetaDataLoader();
MetaDataContext emptyContext = new AbstractMetaDataContext(emptyRetrieval);