/** @return the RPC interface for wave communication. */
protected abstract WaveViewService createWaveViewService();
/** @return upgrader for activating stacklets. Subclasses may override. */
protected MuxConnector createConnector() {
LoggerBundle logger = LoggerBundle.NOP_IMPL;
LoggerContext loggers = new LoggerContext(logger, logger, logger, logger);
IdURIEncoderDecoder uriCodec = new IdURIEncoderDecoder(new ClientPercentEncoderDecoder());
HashedVersionFactory hashFactory = new HashedVersionZeroFactoryImpl(uriCodec);