@abc.abstractmethod<EOL><INDENT>def get_depot_query_session(self):<DEDENT>
return<EOL>
Gets the depot query session.

        :return: a ``DepotQuerySession``
        :rtype: ``osid.installation.DepotQuerySession``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_depot_query()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_depot_query()`` is ``true``.*