How to use

getCosts

method

in

mage.abilities.keyword.SpectacleAbility

public SpectacleAbility(Card card, ManaCost spectacleCosts) {
  super(spectacleCosts, card.getName() + " with spectacle", Zone.HAND, SpellAbilityType.BASE_ALTERNATE);
  this.getCosts().addAll(card.getSpellAbility().getCosts().copy());
  this.getEffects().addAll(card.getSpellAbility().getEffects().copy());
  this.getTargets().addAll(card.getSpellAbility().getTargets().copy());
  this.spellAbilityType = SpellAbilityType.BASE_ALTERNATE;
  this.timing = card.getSpellAbility().getTiming();
  this.setRuleAtTheTop(true);
  this.rule = "Spectacle " + spectacleCosts.getText()
      + " <i>(You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)</i>";
}