<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_objective_bank_ids_by_objective(self, objective_id):
 """Gets the list of ``ObjectiveBank`` ``Ids`` mapped to an ``Objective``. arg: objective_id (osid.id.Id):
 ``Id`` of an ``Objective`` return: (osid.id.IdList) - list of objective bank ``Ids`` raise: NotFound - ``objective_id`` is not found raise: NullArgument - ``objective_id`` is ``null`` raise: OperationFailed - unable to complete request raise: PermissionDenied - authorization failure *compliance: mandatory -- This method must be implemented.* """

        # Implemented from template for
        # osid.resource.ResourceBinSession.get_bin_ids_by_resource
        mgr = self._get_provider_manager('LEARNING', local=True)
        lookup_session = mgr.get_objective_lookup_session(proxy=self._proxy)
        lookup_session.use_federated_objective_bank_view()
        objective = lookup_session.get_objective(objective_id)
        id_list = []
        for idstr in objective._my_map['assignedObjectiveBankIds']:
            id_list.append(Id(idstr))
        return IdList(id_list)