@utilities.arguments_not_none<EOL><INDENT>def get_assets_by_repositories(self, repository_ids):<DEDENT>
<EOL>asset_list = []<EOL>for repository_id in repository_ids:<EOL><INDENT>asset_list += list(<EOL>self.get_assets_by_repository(repository_id))<EOL><DEDENT>return objects.AssetList(asset_list)<EOL>
Gets the list of ``Assets`` corresponding to a list of ``Repository`` objects.

        arg:    repository_ids (osid.id.IdList): list of repository
                ``Ids``
        return: (osid.repository.AssetList) - list of assets
        raise:  NullArgument - ``repository_ids`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*