code: public OperationFuture<List<Group>> modify(List<Group> groups, GroupConfig groupConfig) {
  
          groups.stream()
              .forEach(group -> modify(group, groupConfig));
  
          return new OperationFuture<>(
              groups,
              new NoWaitingJobFuture()
          );
      }
docs: Update provided list of groups
  @param groups      group list
  @param groupConfig group config
  @return OperationFuture wrapper for list of Group