Linked threads

const shipment = await connection.thread(`shipment:${shipmentId}`);
await shipment.linkThread(order.id, 'parent');

shipment, err := conn.Thread(ctx, "shipment:"+shipmentID)
if err != nil {
    return err
}
err = shipment.LinkThread(ctx, order.ThreadID, "parent")

shipment = await connection.thread(f"shipment:{shipment_id}")
await shipment.link_thread(order.thread_id, "parent")

const chain = await connection.getThreadChain(order.id, 3);

chain, err := conn.GetThreadChain(ctx, order.ThreadID, 3)
if err != nil {
    return err
}
for _, t := range chain {
    fmt.Println(t.ID, t.Status)
}

chain = await connection.get_thread_chain(order.thread_id, max_depth=3)
for t in chain:
    print(t.id, t.status)