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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_max_waypoint_items_metadata(self):
 """get the metadata for max waypoint items"""

        metadata = dict(self._max_waypoint_items_metadata)
        metadata.update({'existing_cardinal_values': self.my_osid_object_form._my_map['maxWaypointItems']})
        return Metadata(**metadata)