code: def get_objective_ids_by_objective_bank(self, objective_bank_id):
          
          # Implemented from template for
          # osid.resource.ResourceBinSession.get_resource_ids_by_bin
          id_list = []
          for objective in self.get_objectives_by_objective_bank(objective_bank_id):
              id_list.append(objective.get_id())
          return IdList(id_list)
docs: Gets the list of ``Objective``  ``Ids`` associated with an ``ObjectiveBank``.
  
          arg:    objective_bank_id (osid.id.Id): ``Id`` of the
                  ``ObjectiveBank``
          return: (osid.id.IdList) - list of related objectives
          raise:  NotFound - ``objective_bank_id`` is not found
          raise:  NullArgument - ``objective_bank_id`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*