(self, items)
| 185 | return self._storage.intersection([self._wrap_key(item) for item in items]) |
| 186 | |
| 187 | def difference(self, items): |
| 188 | return ObjectIdentitySet._from_storage( |
| 189 | self._storage.difference([self._wrap_key(item) for item in items])) |
| 190 | |
| 191 | def __len__(self): |
| 192 | return len(self._storage) |