public NetworkMetrics showNetworkMetric(String member) throws Exception {
    MemberMXBean bean = validateMember(member);
    NetworkMetrics nm = new NetworkMetrics();
    nm.setBytesReceivedRate(bean.getBytesReceivedRate());
    nm.setBytesSentRate(bean.getBytesSentRate());
    return nm;
  }
@return list of groups visible to the Manager node
geode-core/src/main/java/org/apache/geode/management/internal/beans/DistributedSystemBridge.java