@classmethod
def record_delete(cls, dn):
    """Called to indicate the deletion of an LDAP record.

        :param str dn: The DN of the deleted record.

        :return: None - any returned value is ignored.

        This callback can happen in all modes, and in all phases, to indicate 
        that an entry has been either been deleted, or that it no longer 
        matches your search.  In refresh-only mode, and the refresh phase of 
        refresh-and-perist mode, the deletion may have taken place at any time 
        since your last update.  In the persist phase of refresh-and-persist 
        mode, the entry has just disappeared.
        """
    pass
