def get_composition_ids_by_repositories(self, repository_ids):
        """Gets the list of ``Composition``  ``Ids`` corresponding to a list of ``Repository`` objects.

        arg:    repository_ids (osid.id.IdList): list of repository
                ``Ids``
        return: (osid.id.IdList) - list of composition ``Ids``
        raise:  NullArgument - ``repository_ids`` 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_resource_ids_by_bins
        id_list = []
        for composition in self.get_compositions_by_repositories(repository_ids):
            id_list.append(composition.get_id())
        return IdList(id_list)
Gets the list of ``Composition``  ``Ids`` corresponding to a list of ``Repository`` objects.

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