private List<JobType> getJobTypeList(ApplicationType appType) {
    List<JobType> jobTypes = _appTypeToJobTypeList.get(appType);
    if (jobTypes == null) {
      jobTypes = new ArrayList<JobType>();
      _appTypeToJobTypeList.put(appType, jobTypes);
    }
    return jobTypes;
  }
This class manages the job type configurations
app/com/linkedin/drelephant/configurations/jobtype/JobTypeConfiguration.java