public static short containerIdFromStatsContainerKey(String containerKey) {
    return Short.valueOf(containerKey.substring(2, containerKey.length() - 1));
  }
Return container is from container key of stats report. It's the opposite of {@link #statsContainerKey}.
@param containerKey the container key of stats report.
@return The container id.
ambry-utils/src/main/java/com/github/ambry/utils/Utils.java