nodes[force_closing_node].node.force_close_broadcasting_latest_txn(&chan_ab.2, &nodes[counterparty_node].node.get_our_node_id(), error_message.to_string()).unwrap();
check_closed_broadcast!(nodes[force_closing_node], true);
check_added_monitors!(nodes[force_closing_node], 1);
nodes[force_closing_node].node.force_close_broadcasting_latest_txn(&chan_ab.2, &nodes[counterparty_node].node.get_our_node_id(), error_message.to_string()).unwrap();
check_closed_broadcast!(nodes[force_closing_node], true);
check_added_monitors!(nodes[force_closing_node], 1);