@JsonIgnore
  public boolean isEmpty() {
    return logicalStorageUsage == 0 && physicalStorageUsage == 0 && numberOfBlobs == 0;
  }
True if all the storage stats values are 0.
@return True if all the stats values are 0.
ambry-api/src/main/java/com/github/ambry/server/storagestats/ContainerStorageStats.java