Return ``True`` if exc is ECONNRESET or equivalent.

        May be overridden in subclasses.

def _is_connreset(self, exc: BaseException) -> bool:
        """Return ``True`` if exc is ECONNRESET or equivalent.

        May be overridden in subclasses.
        """
        return (
            isinstance(exc, (socket.error, IOError))
            and errno_from_exception(exc) in _ERRNO_CONNRESET
        )