{"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
                let match_expr_in_file = InFile::new(file_id, match_expr.into());
                let focus_range = match_expr.match_token()?.text_range();
                Some(expr_to_nav(db, match_expr_in_file, Some(focus_range)))