'Called when we see the close brace -- checks for a slash feature,
and adds in default values.'

def _finalize(self, s, pos, reentrances, fstruct):

    match = self._SLASH_RE.match(s, pos)
    if match:
        name = self._slash_feature
        (v, pos) = self._read_value(name, s, match.end(), reentrances)
        fstruct[name] = v
    return (fstruct, pos)
