Mark whether the whole thread, i.e. all the messages in the thread, are seen or unseen for the current user. This does not affect whether the user is subscribed to the thread or not.
// To mark a thread as unseenawaitwindow.CordSDK.thread.setSeen('my-awesome-thread-id',false);// To mark a thread as seenawaitwindow.CordSDK.thread.setSeen('my-awesome-thread-id',true);