public bool GetBranchEfecAccumMinutes(long lGroup, ref long m_lRealAccMinutes)
        {
            trace.Write(TraceLevel.Debug, "CM1GroupsTree::GetBranchAccumMinutes");
            bool fnResult = true;

            try
            {
                CM1Group group = GetGroupFromGrpId(lGroup);
                if (group == null)
                {
                    throw new InvalidOperationException("Could not obtain group of current operation");
                }

                long lGrpAccMinutes = 0;
                m_lRealAccMinutes = 0;

                while (group != null)
                {
                    lGrpAccMinutes    = group.GetEfecAccMinutes();
                    m_lRealAccMinutes = Math.Max(lGrpAccMinutes, m_lRealAccMinutes);
                    group             = GetGroupParent(group.GetGrpId());
                }

                trace.Write(TraceLevel.Info, $"Minutes accumulate for branch of group {lGroup}: {m_lRealAccMinutes}");
            }
            catch (Exception error)
            {
                trace.Write(TraceLevel.Error, error.ToLogString());
                fnResult = false;
            }

            return(fnResult);
        }