def _summary_args(self):
        """returns a sorted sequence of 2-tuple containing the
        ``(flag_name, flag_value)`` for flag that are set with a non-default
        value.
        """
        args = []
        for k in sorted(self.options):
            opt = self.options[k]
            if self.is_set(k):
                flagval = getattr(self, k)
                if opt.default != flagval:
                    v = (k, flagval)
                    args.append(v)
        return args
returns a sorted sequence of 2-tuple containing the
        ``(flag_name, flag_value)`` for flag that are set with a non-default
        value.
        
numba/core/targetconfig.py