{"ast_node_type":"function","tokens":[{"end":84,"kind":"keyword","start":0,"text":"expect![[\"fn"}]}
        expect![["fn add() {} fn add_one() {} fn f() -> i32 {add_one(add(3, 2))}"]],
        "fn add() {} fn add_one() {} fn f() -> i32 {3 + 2 + 1}",
    )