@Override
    protected void registerCommands() {
        this.commandManager = new SpongeCommandExecutor(this);
        this.bootstrap.registerListeners(new RegisterCommandsListener(this.bootstrap.getPluginContainer(), this.commandManager));
    }
LuckPerms implementation for the Sponge API.
sponge/src/main/java/me/lucko/luckperms/sponge/LPSpongePlugin.java