'Change all or some of a node\'s handlers to the default
handlers. Useful for manually overriding the contents
of a node that would otherwise be handled by a JID level
or global level dynamic handler.
The default is to use the built-in static handlers, but that
may be changed by modifying self.default_handlers.
Arguments:
jid      -- The JID owning the node to modify.
node     -- The node to change to using static handlers.
handlers -- Optional list of handlers to change to the
default version. If provided, only these
handlers will be changed. Otherwise, all
handlers will use the default version.'

def restore_defaults(self, jid=None, node=None, handlers=None):

    if (handlers is None):
        handlers = self._disco_ops
    for op in handlers:
        self.api.restore_default(op, jid, node)
