{"ast_node_type":"function","tokens":[{"end":67,"kind":"keyword","start":0,"text":"r#\"fn"}]}
            r#"fn foo<T, F>() where T: u32, F: FnOnce(T) -> T {}"#,
            r#"fn foo<T: u32, $0F: FnOnce(T) -> T>() {}"#,
        );