private String getDefaultGroup(String world){
		String[] groups = getGroups();
		
		if(world == null){
			world = "true";
		}
		
		for(int i = 0; i < groups.length; i++){
			if(xm.getPermissions().get().isSet("groups." + groups[i] + ".default")){
				if(xm.getPermissions().get().getString("groups." + groups[i] + ".default").equalsIgnoreCase(world)){
					return groups[i];
				}
				if(world.equalsIgnoreCase("true")){
					if(xm.getPermissions().get().getBoolean("groups." + groups[i] + ".default")){
						return groups[i];
					}
				}
			}
		}
		
		return null;
	}