def lsub(self, directory='""', pattern='*'):
        name = 'LSUB'
        typ, dat = self._simple_command(name, directory, pattern)
        return self._untagged_response(typ, dat, name)
List 'subscribed' mailbox names in directory matching pattern.
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/python/Lib/imaplib.py/IMAP4.lsub