| 1154 | |
| 1155 | |
| 1156 | class _EmptyServerSession: |
| 1157 | __slots__ = "dirty", "started_retryable_write" |
| 1158 | |
| 1159 | def __init__(self) -> None: |
| 1160 | self.dirty = False |
| 1161 | self.started_retryable_write = False |
| 1162 | |
| 1163 | def mark_dirty(self) -> None: |
| 1164 | self.dirty = True |
| 1165 | |
| 1166 | def inc_transaction_id(self) -> None: |
| 1167 | self.started_retryable_write = True |
| 1168 | |
| 1169 | |
| 1170 | class _ServerSession: |