code: final Object[] actorProxyFor(final Class<?>[] protocol, final Actor actor, final Mailbox mailbox) {
      final Object[] proxies = new Object[protocol.length];
  
      for (int idx = 0; idx < protocol.length; ++idx) {
        proxies[idx] = actorProxyFor(protocol[idx], actor, mailbox);
      }
  
      return proxies;
    }
docs: Answers the Object[] protocol proxies for this newly created Actor. (INTERNAL ONLY)
  @param protocols the {@code Class<?>}[] protocols of the Actor
  @param actor the Actor instance that backs the proxy protocol
  @param mailbox the Mailbox instance of this Actor
  @return Object[]