Function components 

pub fn components(
    components: &[Component],
    scope: Option<&str>,
    ctx: &Context,
) -> String

The components a queue splits its work by.

The name leads, because the name is what --set components=… takes; the id is beside it for the payloads that want one. AUTO is there because a component that assigns automatically changes what a write does, which is not something to discover afterwards.