How can find the description for switches?

I'm trying to generate the protocol based on the specifications on this repo, but I can't tell where I should be looking to understand what's the description for switches cases.

Taking the boss_bar packet as an example, how can I tell the variants names like here (add, remove, update health, etc.)?

Right now what I managed to generate is:

pub enum BossBarResponse_Enum<'p> {
    Variant_0 { title: &'p str, health: f32, color: i32, dividers: i32, flags: u8 },
    Variant_2 { health: f32 },
    Variant_3 { title: &'p str },
    Variant_4 { color: i32, dividers: i32 },
    Variant_5 { flags: u8 },
}

Which is quite unhelpful for whomever tries to use the packet. I don't see how I could generate this better. Also I don't see how I can figure out that 1: remove is even a valid choice for this packet.

Thanks.

Start with data/pc/1.20.2/protocol.json and the boss_bar packet section linked in the issue, then compare its switch cases with the linked wiki.vg protocol entry. Determine where variant descriptions and the missing choice are represented; the issue is complete when a newcomer can identify the named boss-bar variants from the repository data.