code: public EventHandlerGroup<T> after(final EventProcessor... processors)
      {
          for (final EventProcessor processor : processors)
          {
              consumerRepository.add(processor);
          }
  
          return new EventHandlerGroup<>(this, consumerRepository, Util.getSequencesFor(processors));
      }
docs: Create a group of event processors to be used as a dependency.
  
  @param processors the event processors, previously set up with {@link #handleEventsWith(com.lmax.disruptor.EventProcessor...)},
  that will form the barrier for subsequent handlers or processors.
  @return an {@link EventHandlerGroup} that can be used to setup a {@link SequenceBarrier} over the specified event processors.
  @see #after(com.lmax.disruptor.EventHandler[])