{"ast_node_type":"function","tokens":[{"end":61,"kind":"keyword","start":0,"text":"fn"}]}
fn f() { let a: i32 = 1; let b: Option<i32> = todo$0!(); }"#,
            r#"//- minicore: todo, unimplemented, option
            r#"fn f() { let a: i32 = 1; let b: Option<i32> = None; }"#,