Gets a list of objective banks including and under the given objective bank node in which any objective can be assigned.

        arg:    objective_bank_id (osid.id.Id): the ``Id`` of the
                ``ObjectiveBank``
        return: (osid.id.IdList) - list of assignable objective bank
                ``Ids``
        raise:  NullArgument - ``objective_bank_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        *compliance: mandatory -- This method must be implemented.*

def get_assignable_objective_bank_ids(self, objective_bank_id):
        """Gets a list of objective banks including and under the given objective bank node in which any objective can be assigned.

        arg:    objective_bank_id (osid.id.Id): the ``Id`` of the
                ``ObjectiveBank``
        return: (osid.id.IdList) - list of assignable objective bank
                ``Ids``
        raise:  NullArgument - ``objective_bank_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        *compliance: mandatory -- This method must be implemented.*

        """
        # Implemented from template for
        # osid.resource.ResourceBinAssignmentSession.get_assignable_bin_ids
        # This will likely be overridden by an authorization adapter
        mgr = self._get_provider_manager('LEARNING', local=True)
        lookup_session = mgr.get_objective_bank_lookup_session(proxy=self._proxy)
        objective_banks = lookup_session.get_objective_banks()
        id_list = []
        for objective_bank in objective_banks:
            id_list.append(objective_bank.get_id())
        return IdList(id_list)