code: @Deprecated
    public String getChildJavaOpts(JobConf jobConf, String defaultValue) {
      if (getTask().isJobSetupTask()) {
        return jobConf.get(JobConf.MAPRED_JOB_SETUP_TASK_JAVA_OPTS,
            defaultValue);
      } else if (getTask().isJobCleanupTask()) {
        return jobConf.get(JobConf.MAPRED_JOB_CLEANUP_TASK_JAVA_OPTS,
            defaultValue);
      } else if (getTask().isTaskCleanupTask()) {
        return jobConf.get(JobConf.MAPRED_TASK_CLEANUP_TASK_JAVA_OPTS,
            defaultValue);
      } else {
        return jobConf.get(JobConf.MAPRED_TASK_JAVA_OPTS, defaultValue);
      }
    }
docs: Get the java command line options for the child map/reduce tasks.
  Overriden by specific launchers.
  
  @param jobConf job configuration
  @param defaultValue default value
  @return the java command line options for child map/reduce tasks
  @deprecated Use command line options specific to map or reduce tasks set
  via {@link JobConf#MAPRED_MAP_TASK_JAVA_OPTS} or
  {@link JobConf#MAPRED_REDUCE_TASK_JAVA_OPTS}