public boolean removeListener(int listenerId) {
    synchronized (listeners) {
      RemoteStatListenerImpl remoteStatListener =
          (RemoteStatListenerImpl) listeners.remove(listenerId);
      if (remoteStatListener != null) {
        List<RemoteStatListenerImpl> remoteStatListenerList =
            recipientToListeners.get(remoteStatListener.getRecipient());
        remoteStatListenerList.remove(remoteStatListener);
      }
      return remoteStatListener != null;
    }
  }
Returns the <code>ProcessStats</code> for this Java VM. Note that <code>null</code> will be
returned if operating statistics are disabled.

@since GemFire 3.5
geode-core/src/main/java/org/apache/geode/internal/statistics/GemFireStatSampler.java