@Override
    protected void sendOutgoingMessage(byte[] buf) {
        for (RegisteredServer server : this.plugin.getBootstrap().getProxy().getAllServers()) {
            server.sendPluginMessage(CHANNEL, buf);
        }
    }
An implementation of {@link Messenger} using the plugin messaging channels.
velocity/src/main/java/me/lucko/luckperms/velocity/messaging/PluginMessageMessenger.java