<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _archive_self(self, logfile, key=JobDetails.topkey, status=JobStatus.unknown):
 """Write info about a job run by this `Link` to the job archive"""

        self._register_self(logfile, key, status)
        if self._job_archive is None:
            return
        self._job_archive.register_jobs(self.get_jobs())