@utilities.arguments_not_none<EOL><INDENT>def order_by_statistic(self, meter_id, style):<DEDENT>
raise errors.Unimplemented()<EOL>
Orders by a statistic for a given ``Meter``.

        arg:    meter_id (osid.id.Id): a meter ``Id``
        arg:    style (osid.SearchOrderStyle): search order style
        raise:  NullArgument - ``meter_id`` or ``style`` is ``null``
        *compliance: mandatory -- This method must be implemented.*