code: def get_license_metadata(self):
          
          metadata = dict(self._license_metadata)
          metadata.update({'existing_string_values': self.my_osid_object_form._my_map['license']})
          return Metadata(**metadata)
docs: Gets the metadata for the license.
  
          return: (osid.Metadata) - metadata for the license
          *compliance: mandatory -- This method must be implemented.*