code: public void addDataRow(final String from, final String to, int weight) {
  		final ArrayList<Object> valueData = new ArrayList<>();
  		valueData.add(from);
  		valueData.add(to);
  		valueData.add(weight);
  		values.add(valueData);
  	}
docs: Adds the data row.
  
  @param from the from
  @param to the to
  @param weight the weight