How to use

getEffects

method

in

mage.abilities.common.TapLandForManaAllTriggeredAbility

@Override
public boolean checkTrigger(GameEvent event, Game game) {
  Permanent permanent = game.getPermanentOrLKIBattlefield(event.getSourceId());
  if (permanent != null && permanent.isLand()) {
    if (setTargetPointer) {
      getEffects().get(0).setTargetPointer(new FixedTarget(permanent, game));
    }
    return true;
  }
  return false;
}