Gets the metadata for a display name.

        return: (osid.Metadata) - metadata for the display name
        *compliance: mandatory -- This method must be implemented.*

def get_display_name_metadata(self):
        """Gets the metadata for a display name.

        return: (osid.Metadata) - metadata for the display name
        *compliance: mandatory -- This method must be implemented.*

        """
        metadata = dict(self._mdata['display_name'])
        metadata.update({'existing_string_values': self._my_map['displayName']['text']})
        return Metadata(**metadata)