def get_objective_bank(self):
<EOL>return self._catalog<EOL>
Gets the ``ObjectiveBank`` associated with this session.

        return: (osid.learning.ObjectiveBank) - the ``ObjectiveBank``
                associated with this session
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*