public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
   if (!(sender instanceof Player)) {
     return false;
   }
   Player player = (Player) sender;
   if (MyPetList.hasMyPet(player)) {
     MyPet myPet = MyPetList.getMyPet(player);
     if (myPet.getSkillTree() != null
         && MyPetConfig.chooseSkilltreeOnce
         && !MyPetPermissions.has(myPet.getOwner().getPlayer(), "MyPet.admin")) {
       sender.sendMessage(
           MyPetUtil.setColors(
               MyPetLanguage.getString("Msg_OnlyChooseSkilltreeOnce")
                   .replace("%petname%", myPet.petName)));
     } else if (MyPetSkillTreeMobType.hasMobType(myPet.getPetType().getTypeName())) {
       MyPetSkillTreeMobType skillTreeMobType =
           MyPetSkillTreeMobType.getMobTypeByName(myPet.getPetType().getTypeName());
       if (args.length == 1) {
         if (skillTreeMobType.hasSkillTree(args[0])) {
           MyPetSkillTree skillTree = skillTreeMobType.getSkillTree(args[0]);
           if (MyPetPermissions.has(
               myPet.getOwner().getPlayer(), "MyPet.custom.skilltree." + skillTree.getName())) {
             if (myPet.setSkilltree(skillTree)) {
               sender.sendMessage(
                   MyPetUtil.setColors(
                       MyPetLanguage.getString("Msg_SkilltreeSwitchedTo")
                           .replace("%name%", skillTree.getName())));
             } else {
               sender.sendMessage(
                   MyPetUtil.setColors(MyPetLanguage.getString("Msg_SkilltreeNotSwitched")));
             }
           } else {
             sender.sendMessage(
                 MyPetUtil.setColors(
                     MyPetLanguage.getString("Msg_CantFindSkilltree").replace("%name%", args[0])));
           }
         } else {
           sender.sendMessage(
               MyPetUtil.setColors(
                   MyPetLanguage.getString("Msg_CantFindSkilltree").replace("%name%", args[0])));
         }
       } else {
         sender.sendMessage(
             MyPetUtil.setColors(
                 MyPetLanguage.getString("Msg_AvailableSkilltrees")
                     .replace("%petname%", myPet.petName)));
         for (String skillTreeName : skillTreeMobType.getSkillTreeNames()) {
           if (MyPetPermissions.has(player, "MyPet.custom.skilltree." + skillTreeName)) {
             sender.sendMessage("   " + skillTreeName);
           }
         }
       }
     }
   } else {
     sender.sendMessage(MyPetUtil.setColors(MyPetLanguage.getString("Msg_DontHavePet")));
   }
   return true;
 }