code: public SlaveConnectionInfo slaveConnectionInfo() {
          if (isMaster())
              throw new IllegalStateException("Unable to determine slave connection info. This is a master node");
          return SlaveConnectionInfo.builder().connectionUrl(subscriber.connectionUrl()).masterUrl(publishMasterUrl)
                          .build();
  
      }
docs: When this is a slave node
  it returns the connection url for this node
  and the associated master connection urls in the form of:
  host:port:streamId
  
  @return the slave connection info