code: public static void onDiscardMultiple(Stream<?> multiple, Context context) {
  		Consumer<Object> hook = context.getOrDefault(Hooks.KEY_ON_DISCARD, null);
  		if (hook != null) {
  			try {
  				multiple.forEach(hook);
  			}
  			catch (Throwable t) {
  				log.warn("Error in discard hook while discarding multiple values", t);
  			}
  		}
  	}
docs: Invoke a (local or global) hook that processes elements that get discarded en masse.
  This includes elements that are buffered but subsequently discarded due to
  cancellation or error.
  
  @param multiple the collection of elements to discard (possibly extracted from other
  collections/arrays/queues)
  @param context the {@link Context} in which to look for local hook
  @see #onDiscard(Object, Context)
  @see #onDiscardMultiple(Collection, Context)
  @see #onDiscardQueueWithClear(Queue, Context, Function)