def get_coordinate_conversion_session(self):
raise Unimplemented()<EOL>
Gets a coordinate conversion session.

        return: (osid.locale.CoordinateConversionSession) - a
                ``CoordinateConversionSession``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_coordinate_conversion()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_coordinate_conversion()`` is ``true``.*