How to use

getSourceId

method

in

mage.abilities.keyword.SpectacleAbility

@Override
@SuppressWarnings("unchecked")
public boolean activate(Game game, boolean noMana) {
  if (super.activate(game, noMana)) {
    ArrayList<Integer> spectacleActivations = (ArrayList) game.getState().getValue(SPECTACLE_ACTIVATION_VALUE_KEY + getSourceId());
    if (spectacleActivations == null) {
      spectacleActivations = new ArrayList<>(); // zoneChangeCounter
      game.getState().setValue(SPECTACLE_ACTIVATION_VALUE_KEY + getSourceId(), spectacleActivations);
    }
    spectacleActivations.add(game.getState().getZoneChangeCounter(getSourceId()));
    return true;
  }
  return false;
}