{"ast_node_type":"other","tokens":[{"end":107,"kind":"keyword","start":0,"text":"///"}]}
    /// Both `Option` and `Result` implement `IntoIterator` trait, which allows using them in a `for` loop.
    ///
    /// `for` loop over `Option` or `Result` will iterate either 0 (if the value is `None`/`Err(_)`)