@abc.abstractmethod<EOL><INDENT>def get_objective_bank_search_session(self):<DEDENT>
return<EOL>
Gets the OsidSession associated with the objective bank search service.

        :return: an ``ObjectiveBankSearchSession``
        :rtype: ``osid.learning.ObjectiveBankSearchSession``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_objective_bank_search() is false``

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