def METHOD_NAME(unit_slug, dry_run, verbosity):
    """
    On-leave events that were introduced by the old importer, likely in error
    """
    # TODO: removing these leaves many students with adjacent redundant ACTI statuses: clean those too
    statuses = GradStatus.objects \
            .filter(status='LEAV', student__program__unit__slug=unit_slug) \
            .filter(student__config__contains=SIMS_SOURCE) \
            .exclude(config__contains=SIMS_SOURCE) \
            .select_related('student')
    if not dry_run:
        statuses.update(hidden=True)
    students = sorted(list(set([s.student for s in statuses])), key=lambda s: s.slug)
    for gs in students:
        if verbosity:
            print("Removing on-leave status(es) for %s." % (gs.slug))
        if not dry_run:
            gs.update_status_fields()