{"ast_node_type":"function","tokens":[{"end":71,"kind":"keyword","start":0,"text":"r#\"fn"}]}
            r#"fn f() { let a: i32 = 1; let b: Option<i32> = None; }"#,
fn f() { let a: i32 = 1; let b: Option<i32> = todo$0!(); }"#,
        )