(self)
| 2552 | optional_group = required_group |
| 2553 | |
| 2554 | def end_group(self) -> T.Any: |
| 2555 | self.pop_state() |
| 2556 | return [] |
| 2557 | |
| 2558 | def unclosed_group(self, s: str, loc: int, toks: ParseResults) -> T.Any: |
| 2559 | raise ParseFatalException(s, len(s), "Expected '}'") |