def lookup_id(self, id):
        try:
            return self.Identities[id]
        except __HOLE__:
            if self.fallback:
                return self.fallback.lookup_id(id)
            else:
                return None
dataset/ETHPy150Open antong/ldaptor/ldaptor/protocols/pureber.py/BERDecoderContext.lookup_id