'Get the quota root\'s resource usage and limits.
Part of the IMAP4 QUOTA extension defined in rfc2087.
(typ, [data]) = <instance>.getquota(root)'

def getquota(self, root):

    (typ, dat) = self._simple_command('GETQUOTA', root)
    return self._untagged_response(typ, dat, 'QUOTA')
