WorldPermissionsManager wpm = Permissions.getWorldPermissionsManager();
for (World world : plugin.getServer().getWorlds()) {
PermissionSet ps = wpm.getPermissionSet(world);
File perms = new File("plugins/PermissionsBukkit/config.yml");
Configuration pConfig = new Configuration(perms);
pConfig.load();
List<String> usersList = pConfig.getKeys("users");
List<String> groupsList = pConfig.getKeys("groups");
if (usersList != null)
for (String player : usersList) {
List<String> groups = pConfig.getStringList("users."