*
* @param npc the NPC to enrich
*/
public void addRepairer(final SpeakerNPC npc) {
final RepairerBehaviour repairerBehaviour = new RepairerBehaviour(
new RepairingPriceCalculationStrategy(new HashSet<String>()),
new HashSet<String>(Arrays.asList("buckler")));
final Engine engine = npc.getEngine();
//sentence was not recognized
ChatCondition errorCondition = new SentenceHasErrorCondition();