code: public NotificationWithSubscribers withSubscribers(Subscriber... subscribers) {
          if (this.subscribers == null) {
              setSubscribers(new java.util.ArrayList<Subscriber>(subscribers.length));
          }
          for (Subscriber ele : subscribers) {
              this.subscribers.add(ele);
          }
          return this;
      }
docs: <p>
  A list of subscribers who are subscribed to this notification.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSubscribers(java.util.Collection)} or {@link #withSubscribers(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param subscribers
  A list of subscribers who are subscribed to this notification.
  @return Returns a reference to this object so that method calls can be chained together.