def write_waypoints(self, points):
        """
        Write multiple task declaration points with one call::

            writer.write_waypoints([
                (None, None, 'TAKEOFF'),
                (51.40375, 6.41275, 'START'),
                (50.38210, 8.82105, 'TURN 1'),
                (50.59045, 7.03555, 'TURN 2'),
                (51.40375, 6.41275, 'FINISH'),
                (None, None, 'LANDING'),
            ])
            # -> $PFLAC,S,ADDWP,0000000N,00000000E,TAKEOFF
            # -> $PFLAC,S,ADDWP,5124225N,00624765E,START
            # -> $PFLAC,S,ADDWP,5022926N,00849263E,TURN 1
            # -> $PFLAC,S,ADDWP,5035427N,00702133E,TURN 2
            # -> $PFLAC,S,ADDWP,5124225N,00624765E,FINISH
            # -> $PFLAC,S,ADDWP,0000000N,00000000E,LANDING

        see the :meth:`~aerofiles.flarmcfg.Writer.write_waypoint` method for
        more information.

        :param points: a list of ``(latitude, longitude, text)`` tuples.
        """
        for args in points:
            if len(args) != 3:
                raise ValueError('Invalid number of task point tuple items')

            self.write_waypoint(*args)
Write multiple task declaration points with one call::

            writer.write_waypoints([
                (None, None, 'TAKEOFF'),
                (51.40375, 6.41275, 'START'),
                (50.38210, 8.82105, 'TURN 1'),
                (50.59045, 7.03555, 'TURN 2'),
                (51.40375, 6.41275, 'FINISH'),
                (None, None, 'LANDING'),
            ])
            # -> $PFLAC,S,ADDWP,0000000N,00000000E,TAKEOFF
            # -> $PFLAC,S,ADDWP,5124225N,00624765E,START
            # -> $PFLAC,S,ADDWP,5022926N,00849263E,TURN 1
            # -> $PFLAC,S,ADDWP,5035427N,00702133E,TURN 2
            # -> $PFLAC,S,ADDWP,5124225N,00624765E,FINISH
            # -> $PFLAC,S,ADDWP,0000000N,00000000E,LANDING

        see the :meth:`~aerofiles.flarmcfg.Writer.write_waypoint` method for
        more information.

        :param points: a list of ``(latitude, longitude, text)`` tuples.