def __call__(self, args):
    t = MatchTree(self.name, args)
    t.meta.match_tree = True
    t.meta.orig_expansion = self.expansion
    return t
def __call__(self, args):
    t = MatchTree(self.name, args)
    t.meta.match_tree = True
    t.meta.orig_expansion = self.expansion
    return t