private void updateNoCopiesStatistics(int currentBucketHosts) {
    if (currentBucketHosts == 0 && hasEverHadCopies) {
      incrementNoCopies();
    } else if (currentBucketHosts > 0) {
      hasEverHadCopies = true;
      decrementNoCopies();
    }
  }
Provides the current redundancy of the bucket for this tracker

@return number of redundant copies of the bucket for this tracker
geode-core/src/main/java/org/apache/geode/internal/cache/BucketRedundancyTracker.java