code: boolean isEmpty(Map<String, List<List<RepositoryResource>>> installResources) {
          if (installResources == null)
              return true;
          for (List<List<RepositoryResource>> targetList : installResources.values()) {
              for (List<RepositoryResource> mrList : targetList) {
                  if (!mrList.isEmpty())
                      return false;
              }
          }
          return true;
      }
docs: Checks if installResources map contains any resources
  
  @param installResources the map of installResources
  @return true if all lists in the map are empty