How to use

getTargetPointer

method

in

mage.abilities.effects.common.DestroyAllNamedPermanentsEffect

@Override
public boolean apply(Game game, Ability source) {
  Permanent targetPermanent = game.getPermanent(getTargetPointer().getFirst(game, source));
  if (targetPermanent == null) {
    return false;
  }
  FilterPermanent filter = new FilterPermanent();
  if (CardUtil.haveEmptyName(targetPermanent)) {
    filter.add(new PermanentIdPredicate(targetPermanent.getId()));  // if no name (face down creature) only the creature itself is selected
  } else {
    filter.add(new NamePredicate(targetPermanent.getName()));
  }
  for (Permanent perm : game.getBattlefield().getActivePermanents(filter, source.getControllerId(), game)) {
    perm.destroy(source.getSourceId(), game, false);
  }
  return true;
}