Java SpellAbility.getManaCostsToPay示例

 @Override
 public boolean apply(Game game, Ability source, Ability abilityToModify) {
   SpellAbility spellAbility = (SpellAbility) abilityToModify;
   Mana mana = spellAbility.getManaCostsToPay().getMana();
   if (mana.getColorless() > 0) {
     int count = new DevotionCount(ColoredManaSymbol.B).calculate(game, source);
     int newCount = mana.getColorless() - count;
     if (newCount < 0) {
       newCount = 0;
     }
     mana.setColorless(newCount);
     spellAbility.getManaCostsToPay().load(mana.toString());
     return true;
   }
   return false;
 }