(self)
| 231 | return self[self.last : self.last] |
| 232 | |
| 233 | def proceed(self): |
| 234 | self.expect_frozen() |
| 235 | self.new().expect_no_unobserved() |
| 236 | self._proceeding_from = self.last |
| 237 | self.unfreeze() |
| 238 | |
| 239 | def _expect_realized(self, expectation, first, explain=True, observe=True): |
| 240 | self.expect_frozen() |