private void onContextUpdate(ContextUpdateEvent e) {
        e.getSubject(ServerPlayerEntity.class).ifPresent(p -> requestUpdate(p.getUuid()));
    }
Calls {@link net.minecraft.server.PlayerManager#sendCommandTree()} when a players permissions change.

TODO: Extract base class for this and BukkitCommandListUpdater
fabric/src/main/java/me/lucko/luckperms/fabric/listeners/FabricCommandListUpdater.java