@VisibleForTesting
  void testUseCustomHeartbeatCheck(HeartbeatTimeoutCheck check) {
    clientMonitor.overrideHeartbeatTimeoutCheck(check);
  }
Interface for changing the heartbeat timeout behavior in the ClientHealthMonitorThread, should
only be used for testing
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/ClientHealthMonitor.java