{"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"debug!(span"}]}
        debug!(span = ?lifetime_ref.ident.span);
    fn insert_lifetime(&mut self, lifetime_ref: &'tcx hir::Lifetime, def: ResolvedArg) {
        self.rbv.defs.insert(lifetime_ref.hir_id.local_id, def);