r"""Log ``_message.format(*args, **kwargs)`` with severity ``_level``.

def log(_self, _level, _message, *args, **kwargs):
        r"""Log ``_message.format(*args, **kwargs)`` with severity ``_level``."""
        logger = _self.opt(
            exception=_self._exception,
            record=_self._record,
            lazy=_self._lazy,
            ansi=_self._ansi,
            raw=_self._raw,
            depth=_self._depth + 1,
        )
        logger._make_log_function(_level)(logger, _message, *args, **kwargs)