Method _checkout_existing

lib/sqlalchemy/pool/base.py:1388–1389

(self)

        raise exc.InvalidRequestError("This connection is closed")

    def _checkout_existing(self) -> _ConnectionFairy:
        return _ConnectionFairy._checkout(self._pool, fairy=self)

    def _checkin(self, transaction_was_reset: bool = False) -> None:
        _finalize_fairy(