code: public static List<Integer> rowIndexStringToList(final String row) {
  		if (row == null) {
  			return null;
  		}
  
  		List<Integer> rowIndex = new ArrayList<>();
  
  		try {
  
  			// Convert StringId to array
  			String[] rowIdString = row.split(INDEX_DELIMITER);
  			for (int i = 0; i < rowIdString.length; i++) {
  				rowIndex.add(Integer.parseInt(rowIdString[i]));
  			}
  		} catch (NumberFormatException e) {
  			LOG.warn("Invalid row id: " + row);
  		}
  
  		return rowIndex;
  	}
docs: Convert the string representation of a row index to a list.
  
  @param row the string representation of the row index
  @return the row index