{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"Err(e)"}]}
        Err(e) => match e.downcast::<LspError>() {
        Ok(resp) => lsp_server::Response::new_ok(id, &resp),
            Ok(lsp_error) => lsp_server::Response::new_err(id, lsp_error.code, lsp_error.message),