boolean getIsDestroying() {
    return isDestroying;
  }
This method returns true is a node has taken a responsibility of destroying the
PartitionedRegion globally

@return true, if a node has taken a responsibility of destroying the PartitionedRegion globally
        else it returns false
geode-core/src/main/java/org/apache/geode/internal/cache/PartitionRegionConfig.java