code: public OperationFuture<Group> delete(Group group) {
          Link response = client.deleteGroup(idByRef(group));
  
          return new OperationFuture<>(
                  group,
                  response.getId(),
                  queueClient
          );
      }
docs: Delete provided group
  
  @param group group reference
  @return OperationFuture wrapper for group