* @param output output to connect to.
*/
public void connectNominalValuesInput(
final int index, final SingleActivityOutput output)
{
mColumnIndicesInput.add(new IntegerData(index));
mNominalValuesInput.connect(index, output);
mCurrentIndex++;
if (mCurrentIndex >= mNominalValuesInput.getNumberOfInputs())
{
mColumnIndicesInput.add(ListEnd.VALUE);