public BalanceResponse balanceRSGroup(String groupName, BalanceRequest request)
    throws IOException {
    try {
      BalanceRSGroupRequest req = ProtobufUtil.createBalanceRSGroupRequest(groupName, request);
      return ProtobufUtil.toBalanceResponse(stub.balanceRSGroup(null, req));
    } catch (ServiceException e) {
      throw ProtobufUtil.handleRemoteException(e);
    }
  }
Balance regions in the given RegionServer group.
@return BalanceResponse details about the balancer run
hbase-server/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupAdminClient.java