def validate(cls, structRecs, out):
        print(Counter(_[0] for _ in structRecs).most_common()[:5])
        print(Counter(_[1] for _ in structRecs).most_common()[:5])
        assert len(structRecs) == len([s for sl, _ in out.values() for s in sl]), 'There are non-unique abbreviations'
        errata = {}
        return out, errata