{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"Some(CValue::by_val_pair(block_params[0],"}]}
            Some(CValue::by_val_pair(block_params[0], block_params[1], arg_abi.layout))
            assert_eq!(block_params.len(), 2, "{:?}", block_params);
        }