{"ast_node_type":"variable","tokens":[{"end":100,"kind":"keyword","start":0,"text":"let"}]}
            let (range, text) = if let Some(self_param) = ast::SelfParam::cast(node.value.clone()) {
        for (node, ty) in &types {
                (self_param.name().unwrap().syntax().text_range(), "self".to_owned())