code: public synchronized void startConsumers(Class<? extends Consumer> consumerClass) throws IOException {
          List<ConsumerHolder> consumerHolderSubList = filterConsumersForClass(consumerClass);
          enableConsumers(consumerHolderSubList);
      }
docs: <p>Starts all consumers managed by the container being an instance,
  extending or implementing the given class or interface.</p>
  
  @see {@link #startAllConsumers()}
  
  @param consumerClass The consumer class or interface
  @throws IOException if a consumer registration at the message broker fails