code: private int getCumulatedIndex(final List<StatLineAO> allStatLines) {
  		if (allStatLines == null || allStatLines.isEmpty()) {
  			return -1;
  		}
  
  		int cumulatedIndex = -1;
  
  		for (int i = 0, allStatLinesSize = allStatLines.size(); i < allStatLinesSize; i++) {
  			final StatLineAO statLine = allStatLines.get(i);
  
  			if (CUMULATED_STAT_NAME_VALUE.equals(statLine.getStatName())) {
  				cumulatedIndex = i;
  				break;
  			}
  		}
  
  		return cumulatedIndex;
  	}
docs: Returns index of cumulated stat in producer's stats.
  
  @param allStatLines list of {@link StatLineAO}
  @return index of cumulated stat or {@value -1} if was not found