private static String getJobModelKey(String version) {
    return String.format("%s/%s", JOB_MODEL_GENERATION_KEY, version);
  }
Compares the {@link ContainerModel}s across the two {@link JobModel}s.
@param first first job model
@param second second job model
@return true - if {@link ContainerModel}s are the same across {@link JobModel}s
        false - otherwise
samza-core/src/main/java/org/apache/samza/job/model/JobModelUtil.java