{"ast_node_type":"other","tokens":[{"end":17,"kind":"keyword","start":0,"text":"do_check("}]}
        do_check(
        do_check("fn main() { $0|x: i32| x * 2;}", "fn main() { |x: i32$0| x * 2;}");
            "fn func(x) { return (2 * (x + 3)$0) + 5;}",