{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
            // Re. GATs and GACs (generic_const_items), we're not bound by backward compatibility.
        Node::ImplItem(item) => match item.kind {
            ImplItemKind::Const(..) | ImplItemKind::Type(..) => ParamDefaultPolicy::Forbidden,