{"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"(None,"}]}
            (None, None) => Ok(()),
            (Some(p), Some(c)) => self.attempt_match_node(phase, p.syntax(), c.syntax()),
            (Some(p), None) => fail_match!("Pattern `{}` had nothing to match", p.syntax().text()),