docs: def order_assets(self, asset_ids, composition_id):
          """Reorders a set of assets in a composition.
  
          arg:    asset_ids (osid.id.Id[]): ``Ids`` for a set of
                  ``Assets``
          arg:    composition_id (osid.id.Id): ``Id`` of the
                  ``Composition``
          raise:  NotFound - ``composition_id`` not found or, an
                  ``asset_id`` not related to ``composition_id``
          raise:  NullArgument - ``instruction_ids`` or ``agenda_id`` is
                  ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          *compliance: mandatory -- This method must be implemented.*
  
          """
          self._provider_session.order_assets(self, asset_ids, composition_id)