code: @Override
      public List<ChannelInformation> listChannels() {
          List<Channel> channels = channelDirectory.getChannels();
  
          List<ChannelInformation> channelInformationList = new LinkedList<ChannelInformation>();
          for (Channel channel : channels) {
  
              ChannelInformation channelInfo = new ChannelInformation(channel.getChannelId(), 0, 0);
              channelInformationList.add(channelInfo);
          }
          return channelInformationList;
      }
docs: /*
  (non-Javadoc)
  
  @see io.joynr.messaging.service.ChannelServiceDelegate#listChannels()