if (event.getCreatureType() == CreatureType.SILVERFISH) {
            if (event.getSpawnReason() == SpawnReason.NATURAL);
                Boolean AllowSF = CONFIG.getBoolean("Allow Silverfish",true);
                if (AllowSF == false) ;
                    event.setCancelled(true);
                    String strBoolean = new Boolean(CONFIG.getBoolean("Allow Silverfish",true)).toString();
                    log.info(strBoolean);
        }