private void requestUpdate(UUID uniqueId) {
        if (this.plugin.getBootstrap().isServerStopping()) {
            return;
        }

        if (!this.plugin.getBootstrap().isPlayerOnline(uniqueId)) {
            return;
        }

        // Buffer the request to send a commands update.
        this.sendingBuffers.get(uniqueId).request();
    }
Calls {@link Player#updateCommands()} when a players permissions change.
bukkit/src/main/java/me/lucko/luckperms/bukkit/listeners/BukkitCommandListUpdater.java