def METHOD_NAME(self):
    if "node.x.exportfs" not in capabilities:
        raise ex.Error("exportfs is not installed")
    try:
        up = self.is_up()
    except ex.Error as e:
        self.log.error("continue with stop even if the share is in unknown state")
    if not up:
        self.log.info("%s is already down" % self.path)
        return 0
    for client in self.opts:
        cmd = [ 'exportfs', '-u', ':'.join((client, self.path)) ]
        ret, out, err = self.vcall(cmd)
        clear_cache("exportfs.v")
        clear_cache("showmount.e")
        if ret != 0:
            raise ex.Error