Function names_by_id 

pub(super) fn names_by_id<'a>(
    own: &'a [IdentityAccount],
    mirror: &'a [IdentityAccount],
) -> HashMap<&'a str, &'a str>

Account names by id. This channel’s own accounts win; the global mirror fills the rest, the order identity::resolver::resolve_account uses for display, so an isolated channel whose links point at accounts only the mirror holds does not read as unbound.