void setActualRedundancy(int actualRedundancy) {
    int nonNegativeRedundancy = Math.max(actualRedundancy, 0);
    this.actualRedundancy = nonNegativeRedundancy;
    stats.setActualRedundantCopies(nonNegativeRedundancy);
  }
Decrements the count of buckets that no longer have any copies remaining
geode-core/src/main/java/org/apache/geode/internal/cache/PartitionedRegionRedundancyTracker.java