{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//"}]}
        // Mark this derive as having `Copy` either if it has `Copy` itself or if its parent derive
        self.helper_attrs.insert(expn_id, helper_attrs);
        // has `Copy`, to support cases like `#[derive(Clone, Copy)] #[derive(Debug)]`.