@abc.abstractmethod<EOL><INDENT>def register_for_deleted_packages(self):<DEDENT>
pass<EOL>
Registers for notification of deleted packages.

        ``PackageReceiver.deletedPackages()`` is invoked when a package
        is removed from this depot.

        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*