Revert to the last backed up state.
(self)
| 215 | self._backup = self.get_state() |
| 216 | |
| 217 | def revert(self): |
| 218 | """ |
| 219 | Revert to the last backed up state. |
| 220 | """ |
| 221 | if self._backup: |
| 222 | self.set_state(self._backup) |
| 223 | self._backup = None |
| 224 | |
| 225 | @property |
| 226 | def killable(self): |