More explanation for the wiki about necrotempus

[brunoxkk0]

With this method, you can add a BossBar customization filter.
When the client is going to render a boss, and it is of the filtered type, it will use the defined style instead of the default one, so you can change the bars for certain types of mobs, different from the default pink one.

[LeStegii]

Thanks for the explanation, I'd recommend adding this to the wiki as otherwise people might be confused (as I was).

[brunoxkk0]

I added the explanation on the wiki, I think now it is clearer.