public static <INFO> ForwardingControllerListener<INFO> of(
      ControllerListener<? super INFO> listener1, ControllerListener<? super INFO> listener2) {
    ForwardingControllerListener<INFO> forwarder = create();
    forwarder.addListener(listener1);
    forwarder.addListener(listener2);
    return forwarder;
  }
Listener that forwards controller events to multiple listeners.
drawee/src/main/java/com/facebook/drawee/controller/ForwardingControllerListener.java