@abc.abstractmethod<EOL><INDENT>def register_for_changed_log_entries(self):<DEDENT>
pass<EOL>
Register for notifications of updated log entries.

        ``LogEntryReceiver.changedLogEntries()`` is invoked when a
        ``LogEntry`` iin this log is changed.

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

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