docs: protected void initIncidentHandlers() {
      if (incidentHandlers == null) {
        incidentHandlers = new HashMap<String, IncidentHandler>();
  
        DefaultIncidentHandler failedJobIncidentHandler = new DefaultIncidentHandler(Incident.FAILED_JOB_HANDLER_TYPE);
        incidentHandlers.put(failedJobIncidentHandler.getIncidentHandlerType(), failedJobIncidentHandler);
  
        DefaultIncidentHandler failedExternalTaskIncidentHandler = new DefaultIncidentHandler(Incident.EXTERNAL_TASK_HANDLER_TYPE);
        incidentHandlers.put(failedExternalTaskIncidentHandler.getIncidentHandlerType(), failedExternalTaskIncidentHandler);
      }
      if (customIncidentHandlers != null) {
        for (IncidentHandler incidentHandler : customIncidentHandlers) {
          incidentHandlers.put(incidentHandler.getIncidentHandlerType(), incidentHandler);
        }
      }
    }