Method getTimeAboveOrEqual

include/DataSet.h:315–334

      }

      bool getTimeAboveOrEqual(const KeyType &ID, const double TimeIn, double& TimeOut) const
      {
        if(!this->checkID(ID))
        {
          PRINT_ERROR("Key does not exist: ", ID);
          return false;
        }

        auto It = _DataStreams.at(ID).lower_bound(TimeIn);

        if (It != _DataStreams.at(ID).end())
        {
          TimeOut = It->first;
          return true;
        }
        else
        {
          return false;
        }
      }

      bool getTimeAbove(const KeyType &ID, const double Timestamp, double& NextTimeStamp) const
      {