{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":".unwrap_or((Pat::Missing,"}]}
                    .unwrap_or((Pat::Missing, HygieneId::ROOT));
                    .map(|(path, hygiene)| (Pat::Path(path), hygiene))
                let pat_id = self.alloc_pat_from_expr(path, syntax_ptr);