void performSynchronizeForLostMemberTask(InternalDistributedMember member,
      VersionSource lostVersionID) {
    if (!isInitializedWithWait()) {
      return;
    }
    synchronizeForLostMember(member, lostVersionID);
  }
A reference counter to protected the memoryThresholdReached boolean
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedRegion.java