docs: public boolean isCrossRepositoryGroupMembership(String reposID) throws WIMException {
  
          Map<String, Set<String>> repositoriesForGroup = getRepositoriesForGroup();
  
          int numOfReposForGrp = repositoriesForGroup.get(reposID).size();
          if (numOfReposForGrp > 1) {
              return true;
          }
          if (numOfReposForGrp == 1) {
              String grpReposUUID = repositoriesForGroup.get(reposID).iterator().next();
              if (!reposID.equals(grpReposUUID)) {
                  return true;
              }
          }
  
          return false;
      }