code: public List<WorkUnit> getWorkUnits() {
      ImmutableList.Builder<WorkUnit> allWorkUnits = ImmutableList.builder();
      for (List<WorkUnit> workUnits : this.workUnitsMap.values()) {
        allWorkUnits.addAll(workUnits);
      }
      return allWorkUnits.build();
    }
docs: Get the {@link List} of {@link WorkUnit}s in this container.