Method _check_closed

python/python3/tornado/iostream.py:1017–1019

(self)

        return b

    def _check_closed(self) -> None:
        if self.closed():
            raise StreamClosedError(real_error=self.error)

    def _maybe_add_error_listener(self) -> None:
        # This method is part of an optimization: to detect a connection that