@VisibleForTesting
  public void addStatSamplerStats(StatSamplerStats statSamplerStats) {
    if (statSamplerStats != null) {
      systemStatsMonitor.addStatisticsToMonitor(statSamplerStats.getStats());
    }
  }
This class acts as an Bridge between MemberMBean and GemFire Cache and Distributed System
geode-core/src/main/java/org/apache/geode/management/internal/beans/MemberMBeanBridge.java