code: public Protocols actorFor(final Class<?>[] protocols, final Definition definition) {
      if (isTerminated()) {
        throw new IllegalStateException("vlingo/actors: Stopped.");
      }
  
      return stage().actorFor(protocols, definition);
    }
docs: Answers a {@code Protocols} that provides one or more supported protocols for the
  newly created {@code Actor} according to {@code definition}.
  @param protocols the {@code Class<?>[]} array of protocols that the {@code Actor} supports
  @param definition the {@code Definition} providing parameters to the {@code Actor}
  @return {@code Protocols}