(ctor) KillObjective()
      (ctor) KillObjective( int amount, Type[] types, TextDefinition name )
      (ctor) KillObjective( int amount, Type[] types, TextDefinition name, QuestArea area )
      Type[] AcceptedTypes( get; set; )
      QuestArea Area( get; set; )
      int DesiredAmount( get; set; )
      TextDefinition Name( get; set; )
      virtual BaseObjectiveInstance CreateInstance( MLQuestInstance instance )
      virtual void WriteToGump( Gump g, ref int y )