def get_source_query(self):
pass<EOL>
Gets the query for the source.

        Multiple queries can be retrieved for a nested ``OR`` term.

        return: (osid.resource.ResourceQuery) - the source query
        raise:  Unimplemented - ``supports_source_query()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_source_query()`` is ``true``.*