code: private void updateDurationTimeUnit(FastTrackColumn column)
     {
        if (m_durationTimeUnit == null && isDurationColumn(column))
        {
           int value = ((DurationColumn) column).getTimeUnitValue();
           if (value != 1)
           {
              m_durationTimeUnit = FastTrackUtility.getTimeUnit(value);
           }
        }
     }
docs: Update the default time unit for durations based on data read from the file.
  
  @param column column data