{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"(pat,"}]}
        (pat, _) if is_empty_expr(&expr2) => (pat, expr, expr2),
        (pat, ast::Pat::WildcardPat(_)) => (pat, expr, expr2),
        (_, pat) if is_empty_expr(&expr) => (pat, expr2, expr),